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Two years after UCNS switch to continuous certification, major frustrations remain
Headache medicine expert Joel Saper, MD once saw the formation of the United Council for Neurologic Subspecialties as a sign of progress in the field. In 2005, he even helped write their first certification exam for headache medicine.
Now he’s calling fraud.
After Dr. Saper’s initial 10-year certification expired, he paid $1,800 to take a recertification test. Passing this, he earned another decade of diplomate status; or so he thought, until a couple years later, when he received word from the UCNS.
“They were changing the rules,” Dr. Saper said in an interview. “The 10-year certificate was no longer valid. You had to go through another process.”
That process, known as continuous certification, has become the new standard among medical boards. In contrast with a more conventional recertification process that depends upon high-fee, high-stakes exams taken years apart, continuous certification typically involves a relatively small annual fee coupled with online reading and assessments designed to ensure familiarity with advances in the field.
It’s not just the physicians that need to study up. Medical boards are under pressure to ensure that they are maintaining retention, a potentially challenging task with approximately 200 medical certifying boards in the United States competing for attention, and in some cases, credibility.
Pivots to new systems of recertification have been a particular flash point among physicians. In 2015, a Newsweek article described how a group of “nationally known physicians revolted against the American Board of Internal Medicine” after the board “attempted to expand its program for recertifying doctors, adding boatloads of requirements and fees to be paid by physicians.”
In response, ABIM attacked both the journalist and Newsweek, citing a conflict of interest (the journalist was married to a doctor). The journalist went on to uncover some uncomfortable statistics, including the fact that, over a 5-year period, the ABIM Foundation lost $39.8 million while paying senior administrators $125.7 million. Such revelations have likely added to a collective skepticism about medical boards and their motives.
The changing landscape of recertification
According to Brenda Riggott, executive director of the UCNS, the switch to continuous certification was driven by a need to keep up with new standards.
“We really found the landscape of maintaining medical certifications in general was changing,” Ms. Riggott said, highlighting how the UCNS “evaluated 13 different continuous certification models being administered by medical boards” before settling upon the present model.
Continuous certification with the UCNS now requires a $175 annual fee. Each year, diplomates read 10 journal articles, then take a 25-question online quiz to demonstrate their understanding.
“It’s really about patient care,” Ms. Riggott said in an interview. “Medicine changes rapidly. And there are a lot of advances. Evaluating that once a decade is really not enough to verify that somebody is maintaining their skills, their knowledge.”
Dr. Saper, a clinical professor of neurology at Michigan State University, East Lansing, and founder-director of the Michigan Head Pain and Neurological Institute, Ann Arbor, had no inherent qualm with transitioning to this newer process, but he did take umbrage at its execution, since his UCNS certificate still had about 7 years until expiry.
He said the UCNS should have honored existing certificates through their stated duration, citing precedent set by the American Academy of Neurology. When the AAN transitioned from lifetime board certification to a periodic recertification process, they honored the lifetime status of those who already held it, according to Dr. Saper.
“[The AAN] looked at those of us who had been boarded under the premise that we were going to be lifetime boarded ... and they said: ‘We’re going to grandfather you ... because that was the rule under which you took your initial exams.’ ... That’s what UCNS should have done,” Dr. Saper said.
A compromise
Under pressure from Dr. Saper and others, UCNS compromised by endorsing 10-year diplomates until the 5-year mark.
Alan Rapoport, MD, clinical professor of neurology at the University of California, Los Angeles, and the editor-in-chief of Neurology Reviews, was among those who spoke up, only to see the duration of his certification cut in half.
“UCNS obviously realized that they had been wrong,” Dr. Rapoport said, referring to the compromise they made.
At the 5-year mark, physicians who didn’t adopt the new system were deleted from the UCNS online database, eliminating “the only way the public would know whether or not we were certified. This was after UCNS told us we would stay on the list with a note next to our name suggesting our certification was incomplete. They did not care that this might have hurt our reputations,” Dr. Rapoport said.
“To this day, no refunds, partial or full, have been given for the $1,800 we paid for the privilege of sitting for the exam, or for our time studying, or for the expenses accrued from canceling a day in the office and traveling to a testing center,” Dr. Rapoport said. “I did not want the money back; I wanted the certification promised to me. Since they have removed my name from this list, they do owe me the $1,800. They say they do not return their fees if you fail. How about if you pass and they remove you from their list?”
Yet he went on to make clear that the real issue is the principle of the matter. “This is not about money,” Dr. Rapoport said. “This is about what is fair and right.”
“The UCNS issued me a certificate for 10 years of certification in headache medicine; it is unethical and unlawful to break that contract and grant me only 5 years. Worse, they removed my name as though I do not exist. Along with Dr. Saper, I was one of the doctors that spent time and effort to advance headache medicine from October 1979, when I became a headache specialist, to today. I supported the principles of UCNS and took the first exam. I became the President of the International Headache Society and traveled the world promoting headache medicine; and this is how I am treated. Who can respect this type of certification, or this organization?”
Dr. Saper agreed: “It’s not about the money. It’s about the commitment. It’s very fraudulent.”
After the UCNS decision, Dr. Rapoport and Dr. Saper sought legal counsel, but ultimately decided not to sue the UCNS because of the lengthy process it would entail and the cost, estimated to be over $100,000.
“Our lawyers said: ‘It’s going to be years to get through it. You’ll probably win in the end, because it was fraudulent behavior,’ ” Dr. Saper said.
A different viewpoint
Ms. Riggott offered a different viewpoint: Nobody was guaranteed 10 years of certification.
“People do not pay for certification [from the UCNS],” Ms. Riggott said. “They pay to sit for an exam. It’s an exam administration fee. That can be construed as: ‘They paid for 10 years.’ They did not. They paid to sit for an exam. There are people who pay for an exam, and they don’t pass it, and they’re not certified. They don’t get a refund. That’s just the way high-stakes certification exams go.”
Dr. Saper and Dr. Rapoport see it differently. “The inherent reason any of us sit for an exam is to get certified.” Dr. Rapoport added. “Ms. Riggott is not being honest. There was an implied contract that if we passed, we would be granted a 10-year certification because that was what we did previously and that is what they told us would happen. Why would they have sent me this nice certificate for 10 more years of certification if she were telling the truth?”
Profits over promises
Dr. Rapoport estimates that many other neurologists had their certificates cut short and were dropped from this official list, some of them eminent members of the field, including David Watson, MD, professor and chair of neurology at West Virginia University Rockefeller Neuroscience Institute, Morgantown, and Robert Cowan, MD, professor of neurology and chief of the division of headache medicine at Stanford (Calif.) University.
“It is troubling when the organizations charged with maintaining the integrity of our specialization do not act with integrity,” Dr. Watson said. “The UCNS chose profits over promises and has refused to meaningfully engage with those of us whom they have wronged. What was once a point of pride for me (being in the second class of certified headache medicine diplomates) has become a meaningless piece of paper. This makes me sad.”
Dr. Cowan said the UCNS actions angered him while affirming his lifelong skepticism of clubs. “I was very sorry, but not surprised, to see the UCNS change the rules when the opportunity to make more money presented itself, and not surprised they did not honor their contracts. UCNS is just another scam like Best Doctors in the US and similar hypes. Neither are worth another dime of my money nor the time spent discussing them. One thing more: I have no quarrel with efforts to encourage keeping up with the field, although no one I know needs codification or direction as to which articles should be read. My outrage comes when responsible behavior is used as an excuse to line the pockets of dishonest, immoral individuals. I’m done.”
According to Ms. Riggott, the UCNS continuous certification process continues to evolve based on feedback from diplomates. She noted that “change is hard,” although the challenges of the transition appear to be paying off. “Initial retention for continuing certification is much higher than we would have expected from a high-stakes recertification exam,” she said. “So we are very, very happy about that.”
Proprietary tests drive revenue
According to Katie Collins, executive director of the National Board of Physicians and Surgeons, proprietary tests are a key revenue driver for medical boards, casting doubt on their educational motives.
“This isn’t really about maintaining their education, it’s really about having control over what they learn,” Ms. Collins said. “And unfortunately, physicians no longer have control over what they learn.”
NBPAS was formed largely in response to physicians dissatisfied with this situation. For $189 every 2 years, plus $25 for a paper certificate, NBPAS recertifies doctors originally credentialed by the American Board of Medical Specialties or the American Osteopathic Association.
Instead of making physicians take proprietary tests, NBPAS requires them to earn 50 hours of Accreditation Council for Continuing Medical Education–accredited CME every 2 years. Physicians can select where they seek this credit, giving them the agency to “pick and choose where they want to learn more,” Ms. Collins said, noting that this allows physicians to address personal knowledge gaps, instead of mastering the prescriptive lessons issued by other boards.
While this benefits physicians, Ms. Collins added, it also reduces the bottom line.
NBPAS is a “true 501(c)(3),” she said. “We have money for rainy days, but certainly not millions. We don’t have anything close to a million in savings.” Most medical boards are making millions on top of their services, she said. “That’s not for me to rein in, but it’s for me to point out.”
Noah Rosen, MD, associate professor of neurology and psychiatry at Northwell Health, Great Neck, N.Y., and former UCNS board member, said the UCNS was not motivated by money when they decided to switch to continuous recertification.
“The UCNS budget is publicly available,” Dr. Rosen said in an interview. “This is not a money-making organization,” he added, noting that the UCNS has “been basically operating on a breakeven budget,” and that certification “is not really a money-making proposition.”
Public IRS filings from 2019 and 2020 suggest a slightly different picture. In 2019, the UCNS reported net income of $72,256. In 2020, the inaugural year of the continuous certification program, net income jumped almost fivefold to $349,108. Over the same period, total assets held by the UCNS rose from $1.97 million to $2.37 million.
For comparison, NBPAS controls approximately $500,000 in total assets. The ABIM? Just shy of $72 million.
Recertification highlights a generational gap
Dr. Rosen, who was not a voting board member when the UCNS decided to switch to continuous certification, suggested that the transition could have been handled more effectively.
“I think Dr. Rapoport speaks to the frustration of how they made the transition, and that it could have been done in a way that recognizes people that held the certificate in a better way,” Dr. Rosen said.
He said that the departure of Dr. Rapoport and other neurologists from the UCNS points to another trend in the certification space. “I do think it brings up a deeper issue: What’s the value of certification? Dr. Rapoport and other people have brought up the question: What actually does this certificate bring you, if it’s not recognized by the federal government, and actually is not recognized by a lot of state governments, as well, as an official certification?”
He said the answer could depend on age.
“There seems to be a difference between younger people entering into the field and people that are more established in the field already,” Dr. Rosen said. “Younger people entering the field, they see certification as a distinction, something that separates them from the experiences and maybe every other neurologist.”
Ms. Collins independently pointed out the same generational gap. She noted that when the ABMS changed their maintenance model from lifelong to periodic in 2000, approximately 60% of their physicians had to change with the times, while the remainder did not.
“They grandfathered the other 40% – the older, probably more Caucasian male physicians,” she said. “It’s just the field. It’s evolved, it’s become more diverse. They created a divide in the physician community about what is the best means to maintain your board.”
In response to these comments, and despite his negative experiences with the UCNS, Dr. Rapoport emphasized that he still places high value on subspecialty certification.
“I care a lot about certification and that is why I decided to study for and take the only exam offered at the time,” he said, “I do not need it to continue my practice in headache medicine. No one asks me if I am certified in headache medicine. My patients are referred to me because of my reputation. But I have always sought the highest level of certification I could get. What UCNS has done is to cheapen the value of their certification.”
Dr. Rosen and Ms. Collins highlighted the other side of the same conclusion: For younger physicians, board certifications are more of a career consideration than they are for older physicians, as they could mean the difference between landing or losing a job.
“The American Board of Medical Specialties and [their] 24 member boards have really woven board certification into a requirement for employment for hospital privileges and for reimbursement,” Ms. Collins said.
And so, the practical value of board certification may depend most on the tenure of the person holding paper.
“I have not gone back to get any further certification [from the UCNS],” Dr. Saper said.
Even if his name has been removed from the UCNS register, he pointed out that his printed certificate still shows it’s valid until October 31st, 2026: “If anybody asks: ‘Are you certified?’ I say: ‘Here’s my certificate.’ ”
Headache medicine expert Joel Saper, MD once saw the formation of the United Council for Neurologic Subspecialties as a sign of progress in the field. In 2005, he even helped write their first certification exam for headache medicine.
Now he’s calling fraud.
After Dr. Saper’s initial 10-year certification expired, he paid $1,800 to take a recertification test. Passing this, he earned another decade of diplomate status; or so he thought, until a couple years later, when he received word from the UCNS.
“They were changing the rules,” Dr. Saper said in an interview. “The 10-year certificate was no longer valid. You had to go through another process.”
That process, known as continuous certification, has become the new standard among medical boards. In contrast with a more conventional recertification process that depends upon high-fee, high-stakes exams taken years apart, continuous certification typically involves a relatively small annual fee coupled with online reading and assessments designed to ensure familiarity with advances in the field.
It’s not just the physicians that need to study up. Medical boards are under pressure to ensure that they are maintaining retention, a potentially challenging task with approximately 200 medical certifying boards in the United States competing for attention, and in some cases, credibility.
Pivots to new systems of recertification have been a particular flash point among physicians. In 2015, a Newsweek article described how a group of “nationally known physicians revolted against the American Board of Internal Medicine” after the board “attempted to expand its program for recertifying doctors, adding boatloads of requirements and fees to be paid by physicians.”
In response, ABIM attacked both the journalist and Newsweek, citing a conflict of interest (the journalist was married to a doctor). The journalist went on to uncover some uncomfortable statistics, including the fact that, over a 5-year period, the ABIM Foundation lost $39.8 million while paying senior administrators $125.7 million. Such revelations have likely added to a collective skepticism about medical boards and their motives.
The changing landscape of recertification
According to Brenda Riggott, executive director of the UCNS, the switch to continuous certification was driven by a need to keep up with new standards.
“We really found the landscape of maintaining medical certifications in general was changing,” Ms. Riggott said, highlighting how the UCNS “evaluated 13 different continuous certification models being administered by medical boards” before settling upon the present model.
Continuous certification with the UCNS now requires a $175 annual fee. Each year, diplomates read 10 journal articles, then take a 25-question online quiz to demonstrate their understanding.
“It’s really about patient care,” Ms. Riggott said in an interview. “Medicine changes rapidly. And there are a lot of advances. Evaluating that once a decade is really not enough to verify that somebody is maintaining their skills, their knowledge.”
Dr. Saper, a clinical professor of neurology at Michigan State University, East Lansing, and founder-director of the Michigan Head Pain and Neurological Institute, Ann Arbor, had no inherent qualm with transitioning to this newer process, but he did take umbrage at its execution, since his UCNS certificate still had about 7 years until expiry.
He said the UCNS should have honored existing certificates through their stated duration, citing precedent set by the American Academy of Neurology. When the AAN transitioned from lifetime board certification to a periodic recertification process, they honored the lifetime status of those who already held it, according to Dr. Saper.
“[The AAN] looked at those of us who had been boarded under the premise that we were going to be lifetime boarded ... and they said: ‘We’re going to grandfather you ... because that was the rule under which you took your initial exams.’ ... That’s what UCNS should have done,” Dr. Saper said.
A compromise
Under pressure from Dr. Saper and others, UCNS compromised by endorsing 10-year diplomates until the 5-year mark.
Alan Rapoport, MD, clinical professor of neurology at the University of California, Los Angeles, and the editor-in-chief of Neurology Reviews, was among those who spoke up, only to see the duration of his certification cut in half.
“UCNS obviously realized that they had been wrong,” Dr. Rapoport said, referring to the compromise they made.
At the 5-year mark, physicians who didn’t adopt the new system were deleted from the UCNS online database, eliminating “the only way the public would know whether or not we were certified. This was after UCNS told us we would stay on the list with a note next to our name suggesting our certification was incomplete. They did not care that this might have hurt our reputations,” Dr. Rapoport said.
“To this day, no refunds, partial or full, have been given for the $1,800 we paid for the privilege of sitting for the exam, or for our time studying, or for the expenses accrued from canceling a day in the office and traveling to a testing center,” Dr. Rapoport said. “I did not want the money back; I wanted the certification promised to me. Since they have removed my name from this list, they do owe me the $1,800. They say they do not return their fees if you fail. How about if you pass and they remove you from their list?”
Yet he went on to make clear that the real issue is the principle of the matter. “This is not about money,” Dr. Rapoport said. “This is about what is fair and right.”
“The UCNS issued me a certificate for 10 years of certification in headache medicine; it is unethical and unlawful to break that contract and grant me only 5 years. Worse, they removed my name as though I do not exist. Along with Dr. Saper, I was one of the doctors that spent time and effort to advance headache medicine from October 1979, when I became a headache specialist, to today. I supported the principles of UCNS and took the first exam. I became the President of the International Headache Society and traveled the world promoting headache medicine; and this is how I am treated. Who can respect this type of certification, or this organization?”
Dr. Saper agreed: “It’s not about the money. It’s about the commitment. It’s very fraudulent.”
After the UCNS decision, Dr. Rapoport and Dr. Saper sought legal counsel, but ultimately decided not to sue the UCNS because of the lengthy process it would entail and the cost, estimated to be over $100,000.
“Our lawyers said: ‘It’s going to be years to get through it. You’ll probably win in the end, because it was fraudulent behavior,’ ” Dr. Saper said.
A different viewpoint
Ms. Riggott offered a different viewpoint: Nobody was guaranteed 10 years of certification.
“People do not pay for certification [from the UCNS],” Ms. Riggott said. “They pay to sit for an exam. It’s an exam administration fee. That can be construed as: ‘They paid for 10 years.’ They did not. They paid to sit for an exam. There are people who pay for an exam, and they don’t pass it, and they’re not certified. They don’t get a refund. That’s just the way high-stakes certification exams go.”
Dr. Saper and Dr. Rapoport see it differently. “The inherent reason any of us sit for an exam is to get certified.” Dr. Rapoport added. “Ms. Riggott is not being honest. There was an implied contract that if we passed, we would be granted a 10-year certification because that was what we did previously and that is what they told us would happen. Why would they have sent me this nice certificate for 10 more years of certification if she were telling the truth?”
Profits over promises
Dr. Rapoport estimates that many other neurologists had their certificates cut short and were dropped from this official list, some of them eminent members of the field, including David Watson, MD, professor and chair of neurology at West Virginia University Rockefeller Neuroscience Institute, Morgantown, and Robert Cowan, MD, professor of neurology and chief of the division of headache medicine at Stanford (Calif.) University.
“It is troubling when the organizations charged with maintaining the integrity of our specialization do not act with integrity,” Dr. Watson said. “The UCNS chose profits over promises and has refused to meaningfully engage with those of us whom they have wronged. What was once a point of pride for me (being in the second class of certified headache medicine diplomates) has become a meaningless piece of paper. This makes me sad.”
Dr. Cowan said the UCNS actions angered him while affirming his lifelong skepticism of clubs. “I was very sorry, but not surprised, to see the UCNS change the rules when the opportunity to make more money presented itself, and not surprised they did not honor their contracts. UCNS is just another scam like Best Doctors in the US and similar hypes. Neither are worth another dime of my money nor the time spent discussing them. One thing more: I have no quarrel with efforts to encourage keeping up with the field, although no one I know needs codification or direction as to which articles should be read. My outrage comes when responsible behavior is used as an excuse to line the pockets of dishonest, immoral individuals. I’m done.”
According to Ms. Riggott, the UCNS continuous certification process continues to evolve based on feedback from diplomates. She noted that “change is hard,” although the challenges of the transition appear to be paying off. “Initial retention for continuing certification is much higher than we would have expected from a high-stakes recertification exam,” she said. “So we are very, very happy about that.”
Proprietary tests drive revenue
According to Katie Collins, executive director of the National Board of Physicians and Surgeons, proprietary tests are a key revenue driver for medical boards, casting doubt on their educational motives.
“This isn’t really about maintaining their education, it’s really about having control over what they learn,” Ms. Collins said. “And unfortunately, physicians no longer have control over what they learn.”
NBPAS was formed largely in response to physicians dissatisfied with this situation. For $189 every 2 years, plus $25 for a paper certificate, NBPAS recertifies doctors originally credentialed by the American Board of Medical Specialties or the American Osteopathic Association.
Instead of making physicians take proprietary tests, NBPAS requires them to earn 50 hours of Accreditation Council for Continuing Medical Education–accredited CME every 2 years. Physicians can select where they seek this credit, giving them the agency to “pick and choose where they want to learn more,” Ms. Collins said, noting that this allows physicians to address personal knowledge gaps, instead of mastering the prescriptive lessons issued by other boards.
While this benefits physicians, Ms. Collins added, it also reduces the bottom line.
NBPAS is a “true 501(c)(3),” she said. “We have money for rainy days, but certainly not millions. We don’t have anything close to a million in savings.” Most medical boards are making millions on top of their services, she said. “That’s not for me to rein in, but it’s for me to point out.”
Noah Rosen, MD, associate professor of neurology and psychiatry at Northwell Health, Great Neck, N.Y., and former UCNS board member, said the UCNS was not motivated by money when they decided to switch to continuous recertification.
“The UCNS budget is publicly available,” Dr. Rosen said in an interview. “This is not a money-making organization,” he added, noting that the UCNS has “been basically operating on a breakeven budget,” and that certification “is not really a money-making proposition.”
Public IRS filings from 2019 and 2020 suggest a slightly different picture. In 2019, the UCNS reported net income of $72,256. In 2020, the inaugural year of the continuous certification program, net income jumped almost fivefold to $349,108. Over the same period, total assets held by the UCNS rose from $1.97 million to $2.37 million.
For comparison, NBPAS controls approximately $500,000 in total assets. The ABIM? Just shy of $72 million.
Recertification highlights a generational gap
Dr. Rosen, who was not a voting board member when the UCNS decided to switch to continuous certification, suggested that the transition could have been handled more effectively.
“I think Dr. Rapoport speaks to the frustration of how they made the transition, and that it could have been done in a way that recognizes people that held the certificate in a better way,” Dr. Rosen said.
He said that the departure of Dr. Rapoport and other neurologists from the UCNS points to another trend in the certification space. “I do think it brings up a deeper issue: What’s the value of certification? Dr. Rapoport and other people have brought up the question: What actually does this certificate bring you, if it’s not recognized by the federal government, and actually is not recognized by a lot of state governments, as well, as an official certification?”
He said the answer could depend on age.
“There seems to be a difference between younger people entering into the field and people that are more established in the field already,” Dr. Rosen said. “Younger people entering the field, they see certification as a distinction, something that separates them from the experiences and maybe every other neurologist.”
Ms. Collins independently pointed out the same generational gap. She noted that when the ABMS changed their maintenance model from lifelong to periodic in 2000, approximately 60% of their physicians had to change with the times, while the remainder did not.
“They grandfathered the other 40% – the older, probably more Caucasian male physicians,” she said. “It’s just the field. It’s evolved, it’s become more diverse. They created a divide in the physician community about what is the best means to maintain your board.”
In response to these comments, and despite his negative experiences with the UCNS, Dr. Rapoport emphasized that he still places high value on subspecialty certification.
“I care a lot about certification and that is why I decided to study for and take the only exam offered at the time,” he said, “I do not need it to continue my practice in headache medicine. No one asks me if I am certified in headache medicine. My patients are referred to me because of my reputation. But I have always sought the highest level of certification I could get. What UCNS has done is to cheapen the value of their certification.”
Dr. Rosen and Ms. Collins highlighted the other side of the same conclusion: For younger physicians, board certifications are more of a career consideration than they are for older physicians, as they could mean the difference between landing or losing a job.
“The American Board of Medical Specialties and [their] 24 member boards have really woven board certification into a requirement for employment for hospital privileges and for reimbursement,” Ms. Collins said.
And so, the practical value of board certification may depend most on the tenure of the person holding paper.
“I have not gone back to get any further certification [from the UCNS],” Dr. Saper said.
Even if his name has been removed from the UCNS register, he pointed out that his printed certificate still shows it’s valid until October 31st, 2026: “If anybody asks: ‘Are you certified?’ I say: ‘Here’s my certificate.’ ”
Headache medicine expert Joel Saper, MD once saw the formation of the United Council for Neurologic Subspecialties as a sign of progress in the field. In 2005, he even helped write their first certification exam for headache medicine.
Now he’s calling fraud.
After Dr. Saper’s initial 10-year certification expired, he paid $1,800 to take a recertification test. Passing this, he earned another decade of diplomate status; or so he thought, until a couple years later, when he received word from the UCNS.
“They were changing the rules,” Dr. Saper said in an interview. “The 10-year certificate was no longer valid. You had to go through another process.”
That process, known as continuous certification, has become the new standard among medical boards. In contrast with a more conventional recertification process that depends upon high-fee, high-stakes exams taken years apart, continuous certification typically involves a relatively small annual fee coupled with online reading and assessments designed to ensure familiarity with advances in the field.
It’s not just the physicians that need to study up. Medical boards are under pressure to ensure that they are maintaining retention, a potentially challenging task with approximately 200 medical certifying boards in the United States competing for attention, and in some cases, credibility.
Pivots to new systems of recertification have been a particular flash point among physicians. In 2015, a Newsweek article described how a group of “nationally known physicians revolted against the American Board of Internal Medicine” after the board “attempted to expand its program for recertifying doctors, adding boatloads of requirements and fees to be paid by physicians.”
In response, ABIM attacked both the journalist and Newsweek, citing a conflict of interest (the journalist was married to a doctor). The journalist went on to uncover some uncomfortable statistics, including the fact that, over a 5-year period, the ABIM Foundation lost $39.8 million while paying senior administrators $125.7 million. Such revelations have likely added to a collective skepticism about medical boards and their motives.
The changing landscape of recertification
According to Brenda Riggott, executive director of the UCNS, the switch to continuous certification was driven by a need to keep up with new standards.
“We really found the landscape of maintaining medical certifications in general was changing,” Ms. Riggott said, highlighting how the UCNS “evaluated 13 different continuous certification models being administered by medical boards” before settling upon the present model.
Continuous certification with the UCNS now requires a $175 annual fee. Each year, diplomates read 10 journal articles, then take a 25-question online quiz to demonstrate their understanding.
“It’s really about patient care,” Ms. Riggott said in an interview. “Medicine changes rapidly. And there are a lot of advances. Evaluating that once a decade is really not enough to verify that somebody is maintaining their skills, their knowledge.”
Dr. Saper, a clinical professor of neurology at Michigan State University, East Lansing, and founder-director of the Michigan Head Pain and Neurological Institute, Ann Arbor, had no inherent qualm with transitioning to this newer process, but he did take umbrage at its execution, since his UCNS certificate still had about 7 years until expiry.
He said the UCNS should have honored existing certificates through their stated duration, citing precedent set by the American Academy of Neurology. When the AAN transitioned from lifetime board certification to a periodic recertification process, they honored the lifetime status of those who already held it, according to Dr. Saper.
“[The AAN] looked at those of us who had been boarded under the premise that we were going to be lifetime boarded ... and they said: ‘We’re going to grandfather you ... because that was the rule under which you took your initial exams.’ ... That’s what UCNS should have done,” Dr. Saper said.
A compromise
Under pressure from Dr. Saper and others, UCNS compromised by endorsing 10-year diplomates until the 5-year mark.
Alan Rapoport, MD, clinical professor of neurology at the University of California, Los Angeles, and the editor-in-chief of Neurology Reviews, was among those who spoke up, only to see the duration of his certification cut in half.
“UCNS obviously realized that they had been wrong,” Dr. Rapoport said, referring to the compromise they made.
At the 5-year mark, physicians who didn’t adopt the new system were deleted from the UCNS online database, eliminating “the only way the public would know whether or not we were certified. This was after UCNS told us we would stay on the list with a note next to our name suggesting our certification was incomplete. They did not care that this might have hurt our reputations,” Dr. Rapoport said.
“To this day, no refunds, partial or full, have been given for the $1,800 we paid for the privilege of sitting for the exam, or for our time studying, or for the expenses accrued from canceling a day in the office and traveling to a testing center,” Dr. Rapoport said. “I did not want the money back; I wanted the certification promised to me. Since they have removed my name from this list, they do owe me the $1,800. They say they do not return their fees if you fail. How about if you pass and they remove you from their list?”
Yet he went on to make clear that the real issue is the principle of the matter. “This is not about money,” Dr. Rapoport said. “This is about what is fair and right.”
“The UCNS issued me a certificate for 10 years of certification in headache medicine; it is unethical and unlawful to break that contract and grant me only 5 years. Worse, they removed my name as though I do not exist. Along with Dr. Saper, I was one of the doctors that spent time and effort to advance headache medicine from October 1979, when I became a headache specialist, to today. I supported the principles of UCNS and took the first exam. I became the President of the International Headache Society and traveled the world promoting headache medicine; and this is how I am treated. Who can respect this type of certification, or this organization?”
Dr. Saper agreed: “It’s not about the money. It’s about the commitment. It’s very fraudulent.”
After the UCNS decision, Dr. Rapoport and Dr. Saper sought legal counsel, but ultimately decided not to sue the UCNS because of the lengthy process it would entail and the cost, estimated to be over $100,000.
“Our lawyers said: ‘It’s going to be years to get through it. You’ll probably win in the end, because it was fraudulent behavior,’ ” Dr. Saper said.
A different viewpoint
Ms. Riggott offered a different viewpoint: Nobody was guaranteed 10 years of certification.
“People do not pay for certification [from the UCNS],” Ms. Riggott said. “They pay to sit for an exam. It’s an exam administration fee. That can be construed as: ‘They paid for 10 years.’ They did not. They paid to sit for an exam. There are people who pay for an exam, and they don’t pass it, and they’re not certified. They don’t get a refund. That’s just the way high-stakes certification exams go.”
Dr. Saper and Dr. Rapoport see it differently. “The inherent reason any of us sit for an exam is to get certified.” Dr. Rapoport added. “Ms. Riggott is not being honest. There was an implied contract that if we passed, we would be granted a 10-year certification because that was what we did previously and that is what they told us would happen. Why would they have sent me this nice certificate for 10 more years of certification if she were telling the truth?”
Profits over promises
Dr. Rapoport estimates that many other neurologists had their certificates cut short and were dropped from this official list, some of them eminent members of the field, including David Watson, MD, professor and chair of neurology at West Virginia University Rockefeller Neuroscience Institute, Morgantown, and Robert Cowan, MD, professor of neurology and chief of the division of headache medicine at Stanford (Calif.) University.
“It is troubling when the organizations charged with maintaining the integrity of our specialization do not act with integrity,” Dr. Watson said. “The UCNS chose profits over promises and has refused to meaningfully engage with those of us whom they have wronged. What was once a point of pride for me (being in the second class of certified headache medicine diplomates) has become a meaningless piece of paper. This makes me sad.”
Dr. Cowan said the UCNS actions angered him while affirming his lifelong skepticism of clubs. “I was very sorry, but not surprised, to see the UCNS change the rules when the opportunity to make more money presented itself, and not surprised they did not honor their contracts. UCNS is just another scam like Best Doctors in the US and similar hypes. Neither are worth another dime of my money nor the time spent discussing them. One thing more: I have no quarrel with efforts to encourage keeping up with the field, although no one I know needs codification or direction as to which articles should be read. My outrage comes when responsible behavior is used as an excuse to line the pockets of dishonest, immoral individuals. I’m done.”
According to Ms. Riggott, the UCNS continuous certification process continues to evolve based on feedback from diplomates. She noted that “change is hard,” although the challenges of the transition appear to be paying off. “Initial retention for continuing certification is much higher than we would have expected from a high-stakes recertification exam,” she said. “So we are very, very happy about that.”
Proprietary tests drive revenue
According to Katie Collins, executive director of the National Board of Physicians and Surgeons, proprietary tests are a key revenue driver for medical boards, casting doubt on their educational motives.
“This isn’t really about maintaining their education, it’s really about having control over what they learn,” Ms. Collins said. “And unfortunately, physicians no longer have control over what they learn.”
NBPAS was formed largely in response to physicians dissatisfied with this situation. For $189 every 2 years, plus $25 for a paper certificate, NBPAS recertifies doctors originally credentialed by the American Board of Medical Specialties or the American Osteopathic Association.
Instead of making physicians take proprietary tests, NBPAS requires them to earn 50 hours of Accreditation Council for Continuing Medical Education–accredited CME every 2 years. Physicians can select where they seek this credit, giving them the agency to “pick and choose where they want to learn more,” Ms. Collins said, noting that this allows physicians to address personal knowledge gaps, instead of mastering the prescriptive lessons issued by other boards.
While this benefits physicians, Ms. Collins added, it also reduces the bottom line.
NBPAS is a “true 501(c)(3),” she said. “We have money for rainy days, but certainly not millions. We don’t have anything close to a million in savings.” Most medical boards are making millions on top of their services, she said. “That’s not for me to rein in, but it’s for me to point out.”
Noah Rosen, MD, associate professor of neurology and psychiatry at Northwell Health, Great Neck, N.Y., and former UCNS board member, said the UCNS was not motivated by money when they decided to switch to continuous recertification.
“The UCNS budget is publicly available,” Dr. Rosen said in an interview. “This is not a money-making organization,” he added, noting that the UCNS has “been basically operating on a breakeven budget,” and that certification “is not really a money-making proposition.”
Public IRS filings from 2019 and 2020 suggest a slightly different picture. In 2019, the UCNS reported net income of $72,256. In 2020, the inaugural year of the continuous certification program, net income jumped almost fivefold to $349,108. Over the same period, total assets held by the UCNS rose from $1.97 million to $2.37 million.
For comparison, NBPAS controls approximately $500,000 in total assets. The ABIM? Just shy of $72 million.
Recertification highlights a generational gap
Dr. Rosen, who was not a voting board member when the UCNS decided to switch to continuous certification, suggested that the transition could have been handled more effectively.
“I think Dr. Rapoport speaks to the frustration of how they made the transition, and that it could have been done in a way that recognizes people that held the certificate in a better way,” Dr. Rosen said.
He said that the departure of Dr. Rapoport and other neurologists from the UCNS points to another trend in the certification space. “I do think it brings up a deeper issue: What’s the value of certification? Dr. Rapoport and other people have brought up the question: What actually does this certificate bring you, if it’s not recognized by the federal government, and actually is not recognized by a lot of state governments, as well, as an official certification?”
He said the answer could depend on age.
“There seems to be a difference between younger people entering into the field and people that are more established in the field already,” Dr. Rosen said. “Younger people entering the field, they see certification as a distinction, something that separates them from the experiences and maybe every other neurologist.”
Ms. Collins independently pointed out the same generational gap. She noted that when the ABMS changed their maintenance model from lifelong to periodic in 2000, approximately 60% of their physicians had to change with the times, while the remainder did not.
“They grandfathered the other 40% – the older, probably more Caucasian male physicians,” she said. “It’s just the field. It’s evolved, it’s become more diverse. They created a divide in the physician community about what is the best means to maintain your board.”
In response to these comments, and despite his negative experiences with the UCNS, Dr. Rapoport emphasized that he still places high value on subspecialty certification.
“I care a lot about certification and that is why I decided to study for and take the only exam offered at the time,” he said, “I do not need it to continue my practice in headache medicine. No one asks me if I am certified in headache medicine. My patients are referred to me because of my reputation. But I have always sought the highest level of certification I could get. What UCNS has done is to cheapen the value of their certification.”
Dr. Rosen and Ms. Collins highlighted the other side of the same conclusion: For younger physicians, board certifications are more of a career consideration than they are for older physicians, as they could mean the difference between landing or losing a job.
“The American Board of Medical Specialties and [their] 24 member boards have really woven board certification into a requirement for employment for hospital privileges and for reimbursement,” Ms. Collins said.
And so, the practical value of board certification may depend most on the tenure of the person holding paper.
“I have not gone back to get any further certification [from the UCNS],” Dr. Saper said.
Even if his name has been removed from the UCNS register, he pointed out that his printed certificate still shows it’s valid until October 31st, 2026: “If anybody asks: ‘Are you certified?’ I say: ‘Here’s my certificate.’ ”
Coffee drinkers – even those with a sweet tooth – live longer
Among more than 170,000 people in the United Kingdom, those who drank about two to four cups of coffee a day, with or without sugar, had a lower rate of death than those who didn’t drink coffee, reported lead author Dan Liu, MD, of the department of epidemiology at Southern Medical University, Guangzhou, China.
“Previous observational studies have suggested an association between coffee intake and reduced risk for death, but they did not distinguish between coffee consumed with sugar or artificial sweeteners and coffee consumed without,” Dr. Liu, who is also of the department of public health and preventive medicine, Jinan University, Guangzhou, China, and colleagues wrote in Annals of Internal Medicine.
To learn more, the investigators turned to the UK Biobank, which recruited approximately half a million participants in the United Kingdom between 2006 and 2010 to undergo a variety of questionnaires, interviews, physical measurements, and medical tests. Out of this group, 171,616 participants completed at least one dietary questionnaire and met the criteria for the present study, including lack of cancer or cardiovascular disease upon enrollment.
Results from these questionnaires showed that 55.4% of participants drank coffee without any sweetener, 14.3% drank coffee with sugar, 6.1% drank coffee with artificial sweetener, and 24.2% did not drink coffee at all. Coffee drinkers were further sorted into groups based on how many cups of coffee they drank per day.
Coffee drinkers were significantly less likely to die from any cause
Over the course of about 7 years, 3,177 of the participants died, including 1,725 who died from cancer and 628 who died from cardiovascular disease.
After accounting for other factors that might impact risk of death, like lifestyle choices, the investigators found that coffee drinkers were significantly less likely to die from any cause, cardiovascular disease, or cancer, than those who didn’t drink coffee at all. This benefit was observed across types of coffee, including ground, instant, and decaffeinated varieties. The protective effects of coffee were most apparent in people who drank about two to four cups a day, among whom death was about 30% less likely, regardless of whether they added sugar to their coffee or not. Individuals who drank coffee with artificial sweetener did not live significantly longer than those who drank no coffee at all; however, the investigators suggested that this result may have been skewed by higher rates of negative health factors, such as obesity and hypertension, in the artificial sweetener group.
Dr. Liu and colleagues noted that their findings align with previous studies linking coffee consumption with survival. Like those other studies, the present data revealed a “U-shaped” benefit curve, in which moderate coffee consumption was associated with longer life, whereas low or no consumption and high consumption were not.
Experts caution against drinking sweetened beverages despite new findings
Although the present findings suggested that adding sugar did not eliminate the health benefits of coffee, Dr. Liu and colleagues still cautioned against sweetened beverages, citing widely known associations between sugar consumption and poor health.
In an accompanying editorial, Christina C. Wee, MD, MPH, deputy editor of Annals of Internal Medicine, pointed out a key detail from the data: the amount of sugar added to coffee in the U.K. study may be dwarfed by the amount consumed by some coffee drinkers across the pond.
“The average dose of added sugar per cup of sweetened coffee [in the study] was only a little over a teaspoon, or about 4 grams,” Dr. Wee wrote. “This is a far cry from the 15 grams of sugar in an 8-ounce cup of caramel macchiato at a popular U.S. coffee chain.”
Still, Dr. Wee, an associate professor of medicine at Harvard Medical School, Boston, and director of the obesity research program in the division of general medicine at Beth Israel Deaconess Medical Center, Boston, suggested that your typical coffee drinker can feel safe in their daily habit.
“The evidence does not suggest a need for most coffee drinkers – particularly those who drink it with no or modest amounts of sugar – to eliminate coffee,” she wrote. “So drink up – but it would be prudent to avoid too many caramel macchiatos while more evidence brews.”
Estefanía Toledo, MD, MPH, PhD, of the department of preventive medicine and public health at the University of Navarra, Pamplona, Spain, offered a similar takeaway.
“For those who enjoy drinking coffee, are not pregnant or lactating, and do not have special health conditions, coffee consumption could be considered part of a healthy lifestyle,” Dr. Toledo said in a written comment. “I would recommend adding as little sugar as possible to coffee until more evidence has been accrued.”
Dr. Toledo, who previously published a study showing a link between coffee and extended survival, noted that moderate coffee consumption has “repeatedly” been associated with lower rates of “several chronic diseases” and death, but there still isn’t enough evidence to recommend coffee for those who don’t already drink it.
More long-term research is needed, Dr. Toledo said, ideally with studies comparing changes in coffee consumption and health outcomes over time. These may not be forthcoming, however, as such trials are “not easy and feasible to conduct.”
David Kao, MD, assistant professor of medicine-cardiology and medical director of the school of medicine at the University of Colorado at Denver, Aurora, said that the study conducted by Dr. Liu and colleagues is a “very well-executed analysis” that strengthens our confidence in the safety of long-term coffee consumption, even for patients with heart disease.
Dr. Kao, who recently published an analysis showing that higher coffee intake is associated with a lower risk of heart failure, refrained from advising anyone to up their coffee quota.
“I remain cautious about stating too strongly that people should increase coffee intake purely to improve survival,” Dr. Kao said in a written comment. “That said, it does not appear harmful to increase it some, until you drink consistently more than six to seven cups per day.”
The study was supported by the National Natural Science Foundation of China, the Young Elite Scientist Sponsorship Program by CAST, the Guangdong Basic and Applied Basic Research Foundation, and others. Dr. Toledo and Dr. Kao disclosed no relevant conflicts of interest.
Among more than 170,000 people in the United Kingdom, those who drank about two to four cups of coffee a day, with or without sugar, had a lower rate of death than those who didn’t drink coffee, reported lead author Dan Liu, MD, of the department of epidemiology at Southern Medical University, Guangzhou, China.
“Previous observational studies have suggested an association between coffee intake and reduced risk for death, but they did not distinguish between coffee consumed with sugar or artificial sweeteners and coffee consumed without,” Dr. Liu, who is also of the department of public health and preventive medicine, Jinan University, Guangzhou, China, and colleagues wrote in Annals of Internal Medicine.
To learn more, the investigators turned to the UK Biobank, which recruited approximately half a million participants in the United Kingdom between 2006 and 2010 to undergo a variety of questionnaires, interviews, physical measurements, and medical tests. Out of this group, 171,616 participants completed at least one dietary questionnaire and met the criteria for the present study, including lack of cancer or cardiovascular disease upon enrollment.
Results from these questionnaires showed that 55.4% of participants drank coffee without any sweetener, 14.3% drank coffee with sugar, 6.1% drank coffee with artificial sweetener, and 24.2% did not drink coffee at all. Coffee drinkers were further sorted into groups based on how many cups of coffee they drank per day.
Coffee drinkers were significantly less likely to die from any cause
Over the course of about 7 years, 3,177 of the participants died, including 1,725 who died from cancer and 628 who died from cardiovascular disease.
After accounting for other factors that might impact risk of death, like lifestyle choices, the investigators found that coffee drinkers were significantly less likely to die from any cause, cardiovascular disease, or cancer, than those who didn’t drink coffee at all. This benefit was observed across types of coffee, including ground, instant, and decaffeinated varieties. The protective effects of coffee were most apparent in people who drank about two to four cups a day, among whom death was about 30% less likely, regardless of whether they added sugar to their coffee or not. Individuals who drank coffee with artificial sweetener did not live significantly longer than those who drank no coffee at all; however, the investigators suggested that this result may have been skewed by higher rates of negative health factors, such as obesity and hypertension, in the artificial sweetener group.
Dr. Liu and colleagues noted that their findings align with previous studies linking coffee consumption with survival. Like those other studies, the present data revealed a “U-shaped” benefit curve, in which moderate coffee consumption was associated with longer life, whereas low or no consumption and high consumption were not.
Experts caution against drinking sweetened beverages despite new findings
Although the present findings suggested that adding sugar did not eliminate the health benefits of coffee, Dr. Liu and colleagues still cautioned against sweetened beverages, citing widely known associations between sugar consumption and poor health.
In an accompanying editorial, Christina C. Wee, MD, MPH, deputy editor of Annals of Internal Medicine, pointed out a key detail from the data: the amount of sugar added to coffee in the U.K. study may be dwarfed by the amount consumed by some coffee drinkers across the pond.
“The average dose of added sugar per cup of sweetened coffee [in the study] was only a little over a teaspoon, or about 4 grams,” Dr. Wee wrote. “This is a far cry from the 15 grams of sugar in an 8-ounce cup of caramel macchiato at a popular U.S. coffee chain.”
Still, Dr. Wee, an associate professor of medicine at Harvard Medical School, Boston, and director of the obesity research program in the division of general medicine at Beth Israel Deaconess Medical Center, Boston, suggested that your typical coffee drinker can feel safe in their daily habit.
“The evidence does not suggest a need for most coffee drinkers – particularly those who drink it with no or modest amounts of sugar – to eliminate coffee,” she wrote. “So drink up – but it would be prudent to avoid too many caramel macchiatos while more evidence brews.”
Estefanía Toledo, MD, MPH, PhD, of the department of preventive medicine and public health at the University of Navarra, Pamplona, Spain, offered a similar takeaway.
“For those who enjoy drinking coffee, are not pregnant or lactating, and do not have special health conditions, coffee consumption could be considered part of a healthy lifestyle,” Dr. Toledo said in a written comment. “I would recommend adding as little sugar as possible to coffee until more evidence has been accrued.”
Dr. Toledo, who previously published a study showing a link between coffee and extended survival, noted that moderate coffee consumption has “repeatedly” been associated with lower rates of “several chronic diseases” and death, but there still isn’t enough evidence to recommend coffee for those who don’t already drink it.
More long-term research is needed, Dr. Toledo said, ideally with studies comparing changes in coffee consumption and health outcomes over time. These may not be forthcoming, however, as such trials are “not easy and feasible to conduct.”
David Kao, MD, assistant professor of medicine-cardiology and medical director of the school of medicine at the University of Colorado at Denver, Aurora, said that the study conducted by Dr. Liu and colleagues is a “very well-executed analysis” that strengthens our confidence in the safety of long-term coffee consumption, even for patients with heart disease.
Dr. Kao, who recently published an analysis showing that higher coffee intake is associated with a lower risk of heart failure, refrained from advising anyone to up their coffee quota.
“I remain cautious about stating too strongly that people should increase coffee intake purely to improve survival,” Dr. Kao said in a written comment. “That said, it does not appear harmful to increase it some, until you drink consistently more than six to seven cups per day.”
The study was supported by the National Natural Science Foundation of China, the Young Elite Scientist Sponsorship Program by CAST, the Guangdong Basic and Applied Basic Research Foundation, and others. Dr. Toledo and Dr. Kao disclosed no relevant conflicts of interest.
Among more than 170,000 people in the United Kingdom, those who drank about two to four cups of coffee a day, with or without sugar, had a lower rate of death than those who didn’t drink coffee, reported lead author Dan Liu, MD, of the department of epidemiology at Southern Medical University, Guangzhou, China.
“Previous observational studies have suggested an association between coffee intake and reduced risk for death, but they did not distinguish between coffee consumed with sugar or artificial sweeteners and coffee consumed without,” Dr. Liu, who is also of the department of public health and preventive medicine, Jinan University, Guangzhou, China, and colleagues wrote in Annals of Internal Medicine.
To learn more, the investigators turned to the UK Biobank, which recruited approximately half a million participants in the United Kingdom between 2006 and 2010 to undergo a variety of questionnaires, interviews, physical measurements, and medical tests. Out of this group, 171,616 participants completed at least one dietary questionnaire and met the criteria for the present study, including lack of cancer or cardiovascular disease upon enrollment.
Results from these questionnaires showed that 55.4% of participants drank coffee without any sweetener, 14.3% drank coffee with sugar, 6.1% drank coffee with artificial sweetener, and 24.2% did not drink coffee at all. Coffee drinkers were further sorted into groups based on how many cups of coffee they drank per day.
Coffee drinkers were significantly less likely to die from any cause
Over the course of about 7 years, 3,177 of the participants died, including 1,725 who died from cancer and 628 who died from cardiovascular disease.
After accounting for other factors that might impact risk of death, like lifestyle choices, the investigators found that coffee drinkers were significantly less likely to die from any cause, cardiovascular disease, or cancer, than those who didn’t drink coffee at all. This benefit was observed across types of coffee, including ground, instant, and decaffeinated varieties. The protective effects of coffee were most apparent in people who drank about two to four cups a day, among whom death was about 30% less likely, regardless of whether they added sugar to their coffee or not. Individuals who drank coffee with artificial sweetener did not live significantly longer than those who drank no coffee at all; however, the investigators suggested that this result may have been skewed by higher rates of negative health factors, such as obesity and hypertension, in the artificial sweetener group.
Dr. Liu and colleagues noted that their findings align with previous studies linking coffee consumption with survival. Like those other studies, the present data revealed a “U-shaped” benefit curve, in which moderate coffee consumption was associated with longer life, whereas low or no consumption and high consumption were not.
Experts caution against drinking sweetened beverages despite new findings
Although the present findings suggested that adding sugar did not eliminate the health benefits of coffee, Dr. Liu and colleagues still cautioned against sweetened beverages, citing widely known associations between sugar consumption and poor health.
In an accompanying editorial, Christina C. Wee, MD, MPH, deputy editor of Annals of Internal Medicine, pointed out a key detail from the data: the amount of sugar added to coffee in the U.K. study may be dwarfed by the amount consumed by some coffee drinkers across the pond.
“The average dose of added sugar per cup of sweetened coffee [in the study] was only a little over a teaspoon, or about 4 grams,” Dr. Wee wrote. “This is a far cry from the 15 grams of sugar in an 8-ounce cup of caramel macchiato at a popular U.S. coffee chain.”
Still, Dr. Wee, an associate professor of medicine at Harvard Medical School, Boston, and director of the obesity research program in the division of general medicine at Beth Israel Deaconess Medical Center, Boston, suggested that your typical coffee drinker can feel safe in their daily habit.
“The evidence does not suggest a need for most coffee drinkers – particularly those who drink it with no or modest amounts of sugar – to eliminate coffee,” she wrote. “So drink up – but it would be prudent to avoid too many caramel macchiatos while more evidence brews.”
Estefanía Toledo, MD, MPH, PhD, of the department of preventive medicine and public health at the University of Navarra, Pamplona, Spain, offered a similar takeaway.
“For those who enjoy drinking coffee, are not pregnant or lactating, and do not have special health conditions, coffee consumption could be considered part of a healthy lifestyle,” Dr. Toledo said in a written comment. “I would recommend adding as little sugar as possible to coffee until more evidence has been accrued.”
Dr. Toledo, who previously published a study showing a link between coffee and extended survival, noted that moderate coffee consumption has “repeatedly” been associated with lower rates of “several chronic diseases” and death, but there still isn’t enough evidence to recommend coffee for those who don’t already drink it.
More long-term research is needed, Dr. Toledo said, ideally with studies comparing changes in coffee consumption and health outcomes over time. These may not be forthcoming, however, as such trials are “not easy and feasible to conduct.”
David Kao, MD, assistant professor of medicine-cardiology and medical director of the school of medicine at the University of Colorado at Denver, Aurora, said that the study conducted by Dr. Liu and colleagues is a “very well-executed analysis” that strengthens our confidence in the safety of long-term coffee consumption, even for patients with heart disease.
Dr. Kao, who recently published an analysis showing that higher coffee intake is associated with a lower risk of heart failure, refrained from advising anyone to up their coffee quota.
“I remain cautious about stating too strongly that people should increase coffee intake purely to improve survival,” Dr. Kao said in a written comment. “That said, it does not appear harmful to increase it some, until you drink consistently more than six to seven cups per day.”
The study was supported by the National Natural Science Foundation of China, the Young Elite Scientist Sponsorship Program by CAST, the Guangdong Basic and Applied Basic Research Foundation, and others. Dr. Toledo and Dr. Kao disclosed no relevant conflicts of interest.
FROM ANNALS OF INTERNAL MEDICINE
AGA Clinical Practice Guideline: Diagnosis, treatment of rare hamartomatous polyposis
which is comprised of experts representing the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.
Gastrointestinal hamartomatous polyposis syndromes are rare, autosomal dominant disorders associated with intestinal and extraintestinal tumors. Expert consensus statements have previously offered some recommendations for managing these syndromes, but clinical data are scarce, so the present review “is intended to establish a starting point for future research,” lead author C. Richard Boland, MD, of the University of California, San Diego, and colleagues reported.
According to the investigators, “there are essentially no long-term prospective controlled studies of comparative effectiveness of management strategies for these syndromes.” As a result, their recommendations are based on “low-quality” evidence according to GRADE criteria.
Still, Dr. Boland and colleagues highlighted that “there has been tremendous progress in recent years, both in understanding the underlying genetics that underpin these disorders and in elucidating the biology of associated premalignant and malignant conditions.”
The guideline was published online in Gastroenterology .
Four syndromes reviewed
The investigators gathered these data to provide an overview of genetic and clinical features for each syndrome, as well as management strategies. Four disorders are included: juvenile polyposis syndrome; Peutz-Jeghers syndrome; hereditary mixed polyposis syndrome; and PTEN-hamartoma tumor syndrome, encompassing Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome.
Although all gastrointestinal hamartomatous polyposis syndromes are caused by germline alterations, Dr. Boland and colleagues pointed out that diagnoses are typically made based on clinical criteria, with germline results serving as confirmatory evidence.
The guideline recommends that any patient with a family history of hamartomatous polyps, or with a history of at least two hamartomatous polyps, should undergo genetic testing. The guideline also provides more nuanced genetic testing algorithms for each syndrome.
Among all the hamartomatous polyp disorders, Peutz-Jeghers syndrome is most understood, according to the investigators. It is caused by aberrations in the STK11 gene, and is characterized by polyps with “branching bands of smooth muscle covered by hyperplastic glandular mucosa” that may occur in the stomach, small intestine, and colon. Patients are also at risk of extraintestinal neoplasia.
For management of Peutz-Jeghers syndrome, the guideline advises frequent endoscopic surveillance to prevent mechanical obstruction and bleeding, as well as multidisciplinary surveillance of the breasts, pancreas, ovaries, testes, and lungs.
Juvenile polyposis syndrome is most often characterized by solitary, sporadic polyps in the colorectum (98% of patients affected), followed distantly by polyps in the stomach (14%), ileum (7%), jejunum (7%), and duodenum (7%). The condition is linked with abnormalities in BMPR1A or SMAD4 genes, with SMAD4 germline abnormalities more often leading to “massive” gastric polyps, gastrointestinal bleeding, protein-losing enteropathy, and a higher incidence of gastric cancer in adulthood. Most patients with SMAD4 mutations also have hereditary hemorrhagic telangiectasia, characterized by gastrointestinal bleeding from mucocutaneous telangiectasias, arteriovenous malformations, and epistaxis.
Management of juvenile polyposis syndrome depends on frequent colonoscopies with polypectomies beginning at 12-15 years.
“The goal of surveillance in juvenile polyposis syndrome is to mitigate symptoms related to the disorder and decrease the risk of complications from the manifestations, including cancer,” Dr. Boland and colleagues wrote.
PTEN-hamartoma tumor syndrome, which includes both Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome, is caused by abnormalities in the eponymous PTEN gene. Patients with the condition have an increased risk of colon cancer and polyposis, as well as extraintestinal cancers.
Diagnosis of PTEN-hamartoma tumor syndrome may be complex, involving “clinical examination, mammography and breast MRI, thyroid ultrasound, transvaginal ultrasound, upper gastrointestinal endoscopy, colonoscopy, and renal ultrasound,” according to the guideline.
After diagnosis, frequent colonoscopies are recommended, typically starting at age 35 years, as well as continued surveillance of other organs.
Hereditary mixed polyposis syndrome, which involves attenuated colonic polyposis, is the rarest of the four disorders, having been reported in only “a few families,” according to the guideline. The condition has been linked with “large duplications of the promoter region or entire GREM1 gene.”
Onset is typically in the late 20s, “which is when colonoscopic surveillance should begin,” the investigators wrote. More data are needed to determine appropriate surveillance intervals and if the condition is associated with increased risk of extraintestinal neoplasia.
This call for more research into gastrointestinal hamartomatous polyposis syndromes carried through to the conclusion of the guideline.
“Long-term prospective studies of mutation carriers are still needed to further clarify the risk of cancer and the role of surveillance in these syndromes,” Dr. Boland and colleagues wrote. “With increases in genetic testing and evaluation, future studies will be conducted with more robust cohorts of genetically characterized, less heterogeneous populations. However, there is also a need to study patients and families with unusual phenotypes where no genotype can be found.”
The investigators disclosed no conflicts of interest with the current guideline; however, they provided a list of industry relationships, including Salix Pharmaceuticals, Ferring Pharmaceuticals, and Pfizer, among others.
which is comprised of experts representing the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.
Gastrointestinal hamartomatous polyposis syndromes are rare, autosomal dominant disorders associated with intestinal and extraintestinal tumors. Expert consensus statements have previously offered some recommendations for managing these syndromes, but clinical data are scarce, so the present review “is intended to establish a starting point for future research,” lead author C. Richard Boland, MD, of the University of California, San Diego, and colleagues reported.
According to the investigators, “there are essentially no long-term prospective controlled studies of comparative effectiveness of management strategies for these syndromes.” As a result, their recommendations are based on “low-quality” evidence according to GRADE criteria.
Still, Dr. Boland and colleagues highlighted that “there has been tremendous progress in recent years, both in understanding the underlying genetics that underpin these disorders and in elucidating the biology of associated premalignant and malignant conditions.”
The guideline was published online in Gastroenterology .
Four syndromes reviewed
The investigators gathered these data to provide an overview of genetic and clinical features for each syndrome, as well as management strategies. Four disorders are included: juvenile polyposis syndrome; Peutz-Jeghers syndrome; hereditary mixed polyposis syndrome; and PTEN-hamartoma tumor syndrome, encompassing Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome.
Although all gastrointestinal hamartomatous polyposis syndromes are caused by germline alterations, Dr. Boland and colleagues pointed out that diagnoses are typically made based on clinical criteria, with germline results serving as confirmatory evidence.
The guideline recommends that any patient with a family history of hamartomatous polyps, or with a history of at least two hamartomatous polyps, should undergo genetic testing. The guideline also provides more nuanced genetic testing algorithms for each syndrome.
Among all the hamartomatous polyp disorders, Peutz-Jeghers syndrome is most understood, according to the investigators. It is caused by aberrations in the STK11 gene, and is characterized by polyps with “branching bands of smooth muscle covered by hyperplastic glandular mucosa” that may occur in the stomach, small intestine, and colon. Patients are also at risk of extraintestinal neoplasia.
For management of Peutz-Jeghers syndrome, the guideline advises frequent endoscopic surveillance to prevent mechanical obstruction and bleeding, as well as multidisciplinary surveillance of the breasts, pancreas, ovaries, testes, and lungs.
Juvenile polyposis syndrome is most often characterized by solitary, sporadic polyps in the colorectum (98% of patients affected), followed distantly by polyps in the stomach (14%), ileum (7%), jejunum (7%), and duodenum (7%). The condition is linked with abnormalities in BMPR1A or SMAD4 genes, with SMAD4 germline abnormalities more often leading to “massive” gastric polyps, gastrointestinal bleeding, protein-losing enteropathy, and a higher incidence of gastric cancer in adulthood. Most patients with SMAD4 mutations also have hereditary hemorrhagic telangiectasia, characterized by gastrointestinal bleeding from mucocutaneous telangiectasias, arteriovenous malformations, and epistaxis.
Management of juvenile polyposis syndrome depends on frequent colonoscopies with polypectomies beginning at 12-15 years.
“The goal of surveillance in juvenile polyposis syndrome is to mitigate symptoms related to the disorder and decrease the risk of complications from the manifestations, including cancer,” Dr. Boland and colleagues wrote.
PTEN-hamartoma tumor syndrome, which includes both Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome, is caused by abnormalities in the eponymous PTEN gene. Patients with the condition have an increased risk of colon cancer and polyposis, as well as extraintestinal cancers.
Diagnosis of PTEN-hamartoma tumor syndrome may be complex, involving “clinical examination, mammography and breast MRI, thyroid ultrasound, transvaginal ultrasound, upper gastrointestinal endoscopy, colonoscopy, and renal ultrasound,” according to the guideline.
After diagnosis, frequent colonoscopies are recommended, typically starting at age 35 years, as well as continued surveillance of other organs.
Hereditary mixed polyposis syndrome, which involves attenuated colonic polyposis, is the rarest of the four disorders, having been reported in only “a few families,” according to the guideline. The condition has been linked with “large duplications of the promoter region or entire GREM1 gene.”
Onset is typically in the late 20s, “which is when colonoscopic surveillance should begin,” the investigators wrote. More data are needed to determine appropriate surveillance intervals and if the condition is associated with increased risk of extraintestinal neoplasia.
This call for more research into gastrointestinal hamartomatous polyposis syndromes carried through to the conclusion of the guideline.
“Long-term prospective studies of mutation carriers are still needed to further clarify the risk of cancer and the role of surveillance in these syndromes,” Dr. Boland and colleagues wrote. “With increases in genetic testing and evaluation, future studies will be conducted with more robust cohorts of genetically characterized, less heterogeneous populations. However, there is also a need to study patients and families with unusual phenotypes where no genotype can be found.”
The investigators disclosed no conflicts of interest with the current guideline; however, they provided a list of industry relationships, including Salix Pharmaceuticals, Ferring Pharmaceuticals, and Pfizer, among others.
which is comprised of experts representing the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.
Gastrointestinal hamartomatous polyposis syndromes are rare, autosomal dominant disorders associated with intestinal and extraintestinal tumors. Expert consensus statements have previously offered some recommendations for managing these syndromes, but clinical data are scarce, so the present review “is intended to establish a starting point for future research,” lead author C. Richard Boland, MD, of the University of California, San Diego, and colleagues reported.
According to the investigators, “there are essentially no long-term prospective controlled studies of comparative effectiveness of management strategies for these syndromes.” As a result, their recommendations are based on “low-quality” evidence according to GRADE criteria.
Still, Dr. Boland and colleagues highlighted that “there has been tremendous progress in recent years, both in understanding the underlying genetics that underpin these disorders and in elucidating the biology of associated premalignant and malignant conditions.”
The guideline was published online in Gastroenterology .
Four syndromes reviewed
The investigators gathered these data to provide an overview of genetic and clinical features for each syndrome, as well as management strategies. Four disorders are included: juvenile polyposis syndrome; Peutz-Jeghers syndrome; hereditary mixed polyposis syndrome; and PTEN-hamartoma tumor syndrome, encompassing Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome.
Although all gastrointestinal hamartomatous polyposis syndromes are caused by germline alterations, Dr. Boland and colleagues pointed out that diagnoses are typically made based on clinical criteria, with germline results serving as confirmatory evidence.
The guideline recommends that any patient with a family history of hamartomatous polyps, or with a history of at least two hamartomatous polyps, should undergo genetic testing. The guideline also provides more nuanced genetic testing algorithms for each syndrome.
Among all the hamartomatous polyp disorders, Peutz-Jeghers syndrome is most understood, according to the investigators. It is caused by aberrations in the STK11 gene, and is characterized by polyps with “branching bands of smooth muscle covered by hyperplastic glandular mucosa” that may occur in the stomach, small intestine, and colon. Patients are also at risk of extraintestinal neoplasia.
For management of Peutz-Jeghers syndrome, the guideline advises frequent endoscopic surveillance to prevent mechanical obstruction and bleeding, as well as multidisciplinary surveillance of the breasts, pancreas, ovaries, testes, and lungs.
Juvenile polyposis syndrome is most often characterized by solitary, sporadic polyps in the colorectum (98% of patients affected), followed distantly by polyps in the stomach (14%), ileum (7%), jejunum (7%), and duodenum (7%). The condition is linked with abnormalities in BMPR1A or SMAD4 genes, with SMAD4 germline abnormalities more often leading to “massive” gastric polyps, gastrointestinal bleeding, protein-losing enteropathy, and a higher incidence of gastric cancer in adulthood. Most patients with SMAD4 mutations also have hereditary hemorrhagic telangiectasia, characterized by gastrointestinal bleeding from mucocutaneous telangiectasias, arteriovenous malformations, and epistaxis.
Management of juvenile polyposis syndrome depends on frequent colonoscopies with polypectomies beginning at 12-15 years.
“The goal of surveillance in juvenile polyposis syndrome is to mitigate symptoms related to the disorder and decrease the risk of complications from the manifestations, including cancer,” Dr. Boland and colleagues wrote.
PTEN-hamartoma tumor syndrome, which includes both Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome, is caused by abnormalities in the eponymous PTEN gene. Patients with the condition have an increased risk of colon cancer and polyposis, as well as extraintestinal cancers.
Diagnosis of PTEN-hamartoma tumor syndrome may be complex, involving “clinical examination, mammography and breast MRI, thyroid ultrasound, transvaginal ultrasound, upper gastrointestinal endoscopy, colonoscopy, and renal ultrasound,” according to the guideline.
After diagnosis, frequent colonoscopies are recommended, typically starting at age 35 years, as well as continued surveillance of other organs.
Hereditary mixed polyposis syndrome, which involves attenuated colonic polyposis, is the rarest of the four disorders, having been reported in only “a few families,” according to the guideline. The condition has been linked with “large duplications of the promoter region or entire GREM1 gene.”
Onset is typically in the late 20s, “which is when colonoscopic surveillance should begin,” the investigators wrote. More data are needed to determine appropriate surveillance intervals and if the condition is associated with increased risk of extraintestinal neoplasia.
This call for more research into gastrointestinal hamartomatous polyposis syndromes carried through to the conclusion of the guideline.
“Long-term prospective studies of mutation carriers are still needed to further clarify the risk of cancer and the role of surveillance in these syndromes,” Dr. Boland and colleagues wrote. “With increases in genetic testing and evaluation, future studies will be conducted with more robust cohorts of genetically characterized, less heterogeneous populations. However, there is also a need to study patients and families with unusual phenotypes where no genotype can be found.”
The investigators disclosed no conflicts of interest with the current guideline; however, they provided a list of industry relationships, including Salix Pharmaceuticals, Ferring Pharmaceuticals, and Pfizer, among others.
FROM GASTROENTEROLOGY
Creatinine variability linked to liver transplant outcomes
Patients with greater changes in serum creatinine are more likely to have worse pre- and post–liver transplant outcomes. Moreover, underserved patients may be most frequently affected, according to a retrospective analysis of UNOS (United Network for Organ Sharing) data.
These results should drive further development of serum creatinine coefficient of variation (sCr CoV) as an independent predictor of renal-related mortality risk, according to lead author Giuseppe Cullaro, MD, of the University of California, San Francisco, and colleagues.
“Intra-individual clinical and laboratory parameter dynamics often provide additional prognostic information – added information that goes beyond what can be found with cross-sectional data,” the researchers wrote in Hepatology. “This finding has been seen in several scenarios in the general population – intra-individual variability in blood pressure, weight, hemoglobin, and kidney function, have all been associated with worse clinical outcomes. However, in cirrhosis patients, and more specifically in patients awaiting a liver transplant, kidney function dynamics as a predictor of clinical outcomes has yet to be investigated.”
To gauge the predictive power of shifting kidney values, Dr. Cullaro and colleagues analyzed UNOS/OPTN (Organ Procurement and Transplantation Network) registry data from 2011 through 2019. Exclusion criteria included patients who were aged younger than 18 years, were listed as status 1, received a living donor liver transplantation, were on hemodialysis, or had fewer than three updates. The final dataset included 25,204 patients.
After the researchers sorted patients into low, intermediate, and high sCr CoV tertiles, they used logistic regression to determine relationships between higher sCr and a variety of covariates, such as age, sex, diagnosis, presence of acute kidney injury, or chronic kidney disease. A competing risk regression was then done to look for associations between wait list mortality and the covariables, with liver transplant used as the competing risk.
The median sCr CoV was 17.4% (interquartile range [IQR], 10.8%-29.5%). Patients in the bottom sCr CoV tertile had a median value of 8.8% (IQR, 6.6%-10.8%), compared with 17.4% (IQR, 14.8%-20.4%) in the intermediate variability group and 36.8% (IQR, 29.5%-48.8%) in the high variability group. High variability was associated with female sex, Hispanic ethnicity, ascites, and hepatic encephalopathy as well as higher body mass index, MELDNa score, and serum creatinine.
Of note, each decreasing serum creatinine variability tertile was associated with a significantly lower rate of wait list mortality (34.7% vs. 19.6% vs. 11.7%; P < .001). The creatinine variability profiles were similarly associated with the likelihood of receiving a liver transplant (52.3% vs. 48.9% vs. 43.7%; P < .001) and posttransplant mortality (7.5% vs. 5.5% vs. 3.9%; P < .001).
A multivariate model showed that each 10% increase in sCr CoV predicted an 8% increased risk of a combined outcome comprising post–liver transplant death or post–liver transplant kidney transplant (KALT), independently of other variables (adjusted hazard ratio, 1.08; 95% confidence interval, 1.05-1.11).
“These data highlight that all fluctuations in sCr are associated with worse pre- and post–liver transplant outcomes,” the investigators concluded. “Moreover, the groups that are most underserved by sCr, specifically women, were most likely to have greater sCr CoVs. We believe our work lays the foundation for implementing the sCr CoV as an independent metric of renal-related mortality risk and may be most beneficial for those groups most underserved by sCr values alone.”
According to Brian P. Lee, MD, a hepatologist with Keck Medicine of USC and assistant professor of clinical medicine with the Keck School of Medicine of USC in Los Angeles, “this is a great study ... in an area of high need” that used “high quality data.”
Current liver allocation strategies depend on a snapshot of kidney function, but these new findings suggest that a more dynamic approach may be needed. “As a practicing liver specialist I see that creatinine numbers can fluctuate a lot. ... So which number do you use when you’re trying to calculate what a patient’s risk of death is on the wait list? This study gets toward that answer. If there is a lot of variability, these might be higher risk patients; these might be patients that we should put higher on the transplant waiting list,” said Dr. Lee.
He suggested that clinicians should account for creatinine fluctuations when considering mortality risk; however, the evidence is “not quite there yet ... in terms of changing transplant policy and allocation.” He pointed out three unanswered questions: Why are creatinine values fluctuating? How should fluctuations be scored for risk modeling? And, what impact would those risk scores have on transplant waitlist prioritization?
“I think that that’s the work that you would need to do before you could really change national transplant policy,” Dr. Lee concluded.
The study was supported by the National Institutes of Health and the UCSF Liver Center. Dr. Cullaro and another author have disclosed relationships with Mallinckrodt Pharmaceuticals and Axcella Health, respectively. Dr. Lee reported no conflicts of interest.
Patients with greater changes in serum creatinine are more likely to have worse pre- and post–liver transplant outcomes. Moreover, underserved patients may be most frequently affected, according to a retrospective analysis of UNOS (United Network for Organ Sharing) data.
These results should drive further development of serum creatinine coefficient of variation (sCr CoV) as an independent predictor of renal-related mortality risk, according to lead author Giuseppe Cullaro, MD, of the University of California, San Francisco, and colleagues.
“Intra-individual clinical and laboratory parameter dynamics often provide additional prognostic information – added information that goes beyond what can be found with cross-sectional data,” the researchers wrote in Hepatology. “This finding has been seen in several scenarios in the general population – intra-individual variability in blood pressure, weight, hemoglobin, and kidney function, have all been associated with worse clinical outcomes. However, in cirrhosis patients, and more specifically in patients awaiting a liver transplant, kidney function dynamics as a predictor of clinical outcomes has yet to be investigated.”
To gauge the predictive power of shifting kidney values, Dr. Cullaro and colleagues analyzed UNOS/OPTN (Organ Procurement and Transplantation Network) registry data from 2011 through 2019. Exclusion criteria included patients who were aged younger than 18 years, were listed as status 1, received a living donor liver transplantation, were on hemodialysis, or had fewer than three updates. The final dataset included 25,204 patients.
After the researchers sorted patients into low, intermediate, and high sCr CoV tertiles, they used logistic regression to determine relationships between higher sCr and a variety of covariates, such as age, sex, diagnosis, presence of acute kidney injury, or chronic kidney disease. A competing risk regression was then done to look for associations between wait list mortality and the covariables, with liver transplant used as the competing risk.
The median sCr CoV was 17.4% (interquartile range [IQR], 10.8%-29.5%). Patients in the bottom sCr CoV tertile had a median value of 8.8% (IQR, 6.6%-10.8%), compared with 17.4% (IQR, 14.8%-20.4%) in the intermediate variability group and 36.8% (IQR, 29.5%-48.8%) in the high variability group. High variability was associated with female sex, Hispanic ethnicity, ascites, and hepatic encephalopathy as well as higher body mass index, MELDNa score, and serum creatinine.
Of note, each decreasing serum creatinine variability tertile was associated with a significantly lower rate of wait list mortality (34.7% vs. 19.6% vs. 11.7%; P < .001). The creatinine variability profiles were similarly associated with the likelihood of receiving a liver transplant (52.3% vs. 48.9% vs. 43.7%; P < .001) and posttransplant mortality (7.5% vs. 5.5% vs. 3.9%; P < .001).
A multivariate model showed that each 10% increase in sCr CoV predicted an 8% increased risk of a combined outcome comprising post–liver transplant death or post–liver transplant kidney transplant (KALT), independently of other variables (adjusted hazard ratio, 1.08; 95% confidence interval, 1.05-1.11).
“These data highlight that all fluctuations in sCr are associated with worse pre- and post–liver transplant outcomes,” the investigators concluded. “Moreover, the groups that are most underserved by sCr, specifically women, were most likely to have greater sCr CoVs. We believe our work lays the foundation for implementing the sCr CoV as an independent metric of renal-related mortality risk and may be most beneficial for those groups most underserved by sCr values alone.”
According to Brian P. Lee, MD, a hepatologist with Keck Medicine of USC and assistant professor of clinical medicine with the Keck School of Medicine of USC in Los Angeles, “this is a great study ... in an area of high need” that used “high quality data.”
Current liver allocation strategies depend on a snapshot of kidney function, but these new findings suggest that a more dynamic approach may be needed. “As a practicing liver specialist I see that creatinine numbers can fluctuate a lot. ... So which number do you use when you’re trying to calculate what a patient’s risk of death is on the wait list? This study gets toward that answer. If there is a lot of variability, these might be higher risk patients; these might be patients that we should put higher on the transplant waiting list,” said Dr. Lee.
He suggested that clinicians should account for creatinine fluctuations when considering mortality risk; however, the evidence is “not quite there yet ... in terms of changing transplant policy and allocation.” He pointed out three unanswered questions: Why are creatinine values fluctuating? How should fluctuations be scored for risk modeling? And, what impact would those risk scores have on transplant waitlist prioritization?
“I think that that’s the work that you would need to do before you could really change national transplant policy,” Dr. Lee concluded.
The study was supported by the National Institutes of Health and the UCSF Liver Center. Dr. Cullaro and another author have disclosed relationships with Mallinckrodt Pharmaceuticals and Axcella Health, respectively. Dr. Lee reported no conflicts of interest.
Patients with greater changes in serum creatinine are more likely to have worse pre- and post–liver transplant outcomes. Moreover, underserved patients may be most frequently affected, according to a retrospective analysis of UNOS (United Network for Organ Sharing) data.
These results should drive further development of serum creatinine coefficient of variation (sCr CoV) as an independent predictor of renal-related mortality risk, according to lead author Giuseppe Cullaro, MD, of the University of California, San Francisco, and colleagues.
“Intra-individual clinical and laboratory parameter dynamics often provide additional prognostic information – added information that goes beyond what can be found with cross-sectional data,” the researchers wrote in Hepatology. “This finding has been seen in several scenarios in the general population – intra-individual variability in blood pressure, weight, hemoglobin, and kidney function, have all been associated with worse clinical outcomes. However, in cirrhosis patients, and more specifically in patients awaiting a liver transplant, kidney function dynamics as a predictor of clinical outcomes has yet to be investigated.”
To gauge the predictive power of shifting kidney values, Dr. Cullaro and colleagues analyzed UNOS/OPTN (Organ Procurement and Transplantation Network) registry data from 2011 through 2019. Exclusion criteria included patients who were aged younger than 18 years, were listed as status 1, received a living donor liver transplantation, were on hemodialysis, or had fewer than three updates. The final dataset included 25,204 patients.
After the researchers sorted patients into low, intermediate, and high sCr CoV tertiles, they used logistic regression to determine relationships between higher sCr and a variety of covariates, such as age, sex, diagnosis, presence of acute kidney injury, or chronic kidney disease. A competing risk regression was then done to look for associations between wait list mortality and the covariables, with liver transplant used as the competing risk.
The median sCr CoV was 17.4% (interquartile range [IQR], 10.8%-29.5%). Patients in the bottom sCr CoV tertile had a median value of 8.8% (IQR, 6.6%-10.8%), compared with 17.4% (IQR, 14.8%-20.4%) in the intermediate variability group and 36.8% (IQR, 29.5%-48.8%) in the high variability group. High variability was associated with female sex, Hispanic ethnicity, ascites, and hepatic encephalopathy as well as higher body mass index, MELDNa score, and serum creatinine.
Of note, each decreasing serum creatinine variability tertile was associated with a significantly lower rate of wait list mortality (34.7% vs. 19.6% vs. 11.7%; P < .001). The creatinine variability profiles were similarly associated with the likelihood of receiving a liver transplant (52.3% vs. 48.9% vs. 43.7%; P < .001) and posttransplant mortality (7.5% vs. 5.5% vs. 3.9%; P < .001).
A multivariate model showed that each 10% increase in sCr CoV predicted an 8% increased risk of a combined outcome comprising post–liver transplant death or post–liver transplant kidney transplant (KALT), independently of other variables (adjusted hazard ratio, 1.08; 95% confidence interval, 1.05-1.11).
“These data highlight that all fluctuations in sCr are associated with worse pre- and post–liver transplant outcomes,” the investigators concluded. “Moreover, the groups that are most underserved by sCr, specifically women, were most likely to have greater sCr CoVs. We believe our work lays the foundation for implementing the sCr CoV as an independent metric of renal-related mortality risk and may be most beneficial for those groups most underserved by sCr values alone.”
According to Brian P. Lee, MD, a hepatologist with Keck Medicine of USC and assistant professor of clinical medicine with the Keck School of Medicine of USC in Los Angeles, “this is a great study ... in an area of high need” that used “high quality data.”
Current liver allocation strategies depend on a snapshot of kidney function, but these new findings suggest that a more dynamic approach may be needed. “As a practicing liver specialist I see that creatinine numbers can fluctuate a lot. ... So which number do you use when you’re trying to calculate what a patient’s risk of death is on the wait list? This study gets toward that answer. If there is a lot of variability, these might be higher risk patients; these might be patients that we should put higher on the transplant waiting list,” said Dr. Lee.
He suggested that clinicians should account for creatinine fluctuations when considering mortality risk; however, the evidence is “not quite there yet ... in terms of changing transplant policy and allocation.” He pointed out three unanswered questions: Why are creatinine values fluctuating? How should fluctuations be scored for risk modeling? And, what impact would those risk scores have on transplant waitlist prioritization?
“I think that that’s the work that you would need to do before you could really change national transplant policy,” Dr. Lee concluded.
The study was supported by the National Institutes of Health and the UCSF Liver Center. Dr. Cullaro and another author have disclosed relationships with Mallinckrodt Pharmaceuticals and Axcella Health, respectively. Dr. Lee reported no conflicts of interest.
FROM HEPATOLOGY
NAFLD vs. MAFLD: What’s in a name?
Non-alcoholic fatty liver disease (NAFLD) and metabolic associated fatty liver disease (MAFLD) demonstrate highly similar clinical courses and mortality rates, and a name change may not be clinically beneficial, based on data from more than 17,000 patients.
Instead, etiologic subcategorization of fatty liver disease (FLD) should be considered, reported lead author Zobair M. Younossi, MD, of Betty and Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, Va., and colleagues.
“There is debate about whether NAFLD is an appropriate name as the term ‘non-alcoholic’ overemphasizes the absence of alcohol use and underemphasizes the importance of the metabolic risk factors which are the main drivers of disease progression,” the investigators wrote in Hepatology. “It has been suggested that MAFLD may better reflect these risk factors. However, such a recommendation is made despite a lack of a general consensus on the definition of ‘metabolic health’ and disagreements in endocrinology circles about the term ‘metabolic syndrome.’ Nevertheless, a few investigators have suggested that MAFLD but not NAFLD is associated with increased fibrosis and mortality.”
To look for clinical differences between the two disease entities, Dr. Younossi and colleagues turned to the National Health and Nutrition Examination Survey (NHANES). Specifically, the NHANES III and NHANES 2017-2018 cohorts were employed, including 12,878 and 4,328 participants, respectively.
MAFLD was defined as FLD with overweight/obesity, evidence of metabolic dysregulation, or type 2 diabetes mellitus. NAFLD was defined as FLD without excessive alcohol consumption or other causes of chronic liver disease. Patients were sorted into four groups: NAFLD, MAFLD, both disease types, or neither disease type. Since the categories were not mutually exclusive, the investigators compared clinical characteristics based on 95% confidence intervals. If no overlap was found, then differences were deemed statistically significant.
Diagnoses of NAFLD and MAFLD were highly concordant (kappa coefficient = 0.83-0.94). After a median of 22.8 years follow-up, no significant differences were found between groups for cause-specific mortality, all-cause mortality, or major clinical characteristics except those inherent to the disease definitions (for example, lack of alcohol use in NAFLD). Greatest risk factors for advanced fibrosis in both groups were obesity, high-risk fibrosis, and type 2 diabetes mellitus.
As anticipated, by definition, alcoholic liver disease and excess alcohol use were documented in approximately 15% of patients with MAFLD, but in no patients with NAFLD. As such, alcoholic liver disease predicted liver-specific mortality for MAFLD (hazard ratio, 4.50; 95% confidence interval, 1.89-10.75) but not NAFLD. Conversely, insulin resistance predicted liver-specific mortality in NAFLD (HR, 3.57; 95% CI, 1.35-9.42) but not MAFLD (HR, 0.84; 95% CI, 0.36-1.95).
“These data do not support the notion that a name change from NAFLD to MAFLD will better capture the risk for long-term outcomes of these patients or better define metabolically at-risk patients who present with FLD,” the investigators concluded. “On the other hand, enlarging the definition to FLD with subcategories of ‘alcoholic,’ ‘non-alcoholic,’ ‘drug-induced,’ etc. has merit and needs to be further considered. In this context, a true international consensus group of experts supported by liver and non-liver scientific societies must undertake an evidence-based and comprehensive approach to this issue and assess both the benefits and risks of changing the name.”
According to Rohit Loomba, MD, director of the NAFLD research center and professor of medicine in the division of gastroenterology and hepatology at University of California, San Diego, the study offers a preview of the consequences if NAFLD were changed to MAFLD, most notably by making alcohol a key driver of outcomes.
“If we change the name of a disease entity ... how does that impact natural history?” Dr. Loomba asked in an interview. “This paper gives you an idea. If you start calling it MAFLD, then people are dying from alcohol use, and they’re not dying from what we are currently seeing patients with NAFLD die of.”
He also noted that the name change could disrupt drug development and outcome measures since most drugs currently in development are directed at nonalcoholic steatohepatitis (NASH).
“Is it worth the headache?” Dr. Loomba asked. “How are we going to define NASH-related fibrosis? That probably will remain the same because the therapies that we will use to address that will remain consistent with what we are currently pursuing. ... It’s probably premature to change the nomenclature before assessing the impact on finding new treatment.”
Dr. Younossi disclosed relationships with BMS, Novartis, Gilead, and others. Dr. Loomba serves as a consultant to Aardvark Therapeutics, Altimmune, Anylam/Regeneron, Amgen, Arrowhead Pharmaceuticals, AstraZeneca, Bristol-Myer Squibb, CohBar, Eli Lilly, Galmed, Gilead, Glympse bio, Hightide, Inipharma, Intercept, Inventiva, Ionis, Janssen, Madrigal, Metacrine, NGM Biopharmaceuticals, Novartis, Novo Nordisk, Merck, Pfizer, Sagimet, Theratechnologies, 89 bio, Terns Pharmaceuticals, and Viking Therapeutics.
Non-alcoholic fatty liver disease (NAFLD) and metabolic associated fatty liver disease (MAFLD) demonstrate highly similar clinical courses and mortality rates, and a name change may not be clinically beneficial, based on data from more than 17,000 patients.
Instead, etiologic subcategorization of fatty liver disease (FLD) should be considered, reported lead author Zobair M. Younossi, MD, of Betty and Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, Va., and colleagues.
“There is debate about whether NAFLD is an appropriate name as the term ‘non-alcoholic’ overemphasizes the absence of alcohol use and underemphasizes the importance of the metabolic risk factors which are the main drivers of disease progression,” the investigators wrote in Hepatology. “It has been suggested that MAFLD may better reflect these risk factors. However, such a recommendation is made despite a lack of a general consensus on the definition of ‘metabolic health’ and disagreements in endocrinology circles about the term ‘metabolic syndrome.’ Nevertheless, a few investigators have suggested that MAFLD but not NAFLD is associated with increased fibrosis and mortality.”
To look for clinical differences between the two disease entities, Dr. Younossi and colleagues turned to the National Health and Nutrition Examination Survey (NHANES). Specifically, the NHANES III and NHANES 2017-2018 cohorts were employed, including 12,878 and 4,328 participants, respectively.
MAFLD was defined as FLD with overweight/obesity, evidence of metabolic dysregulation, or type 2 diabetes mellitus. NAFLD was defined as FLD without excessive alcohol consumption or other causes of chronic liver disease. Patients were sorted into four groups: NAFLD, MAFLD, both disease types, or neither disease type. Since the categories were not mutually exclusive, the investigators compared clinical characteristics based on 95% confidence intervals. If no overlap was found, then differences were deemed statistically significant.
Diagnoses of NAFLD and MAFLD were highly concordant (kappa coefficient = 0.83-0.94). After a median of 22.8 years follow-up, no significant differences were found between groups for cause-specific mortality, all-cause mortality, or major clinical characteristics except those inherent to the disease definitions (for example, lack of alcohol use in NAFLD). Greatest risk factors for advanced fibrosis in both groups were obesity, high-risk fibrosis, and type 2 diabetes mellitus.
As anticipated, by definition, alcoholic liver disease and excess alcohol use were documented in approximately 15% of patients with MAFLD, but in no patients with NAFLD. As such, alcoholic liver disease predicted liver-specific mortality for MAFLD (hazard ratio, 4.50; 95% confidence interval, 1.89-10.75) but not NAFLD. Conversely, insulin resistance predicted liver-specific mortality in NAFLD (HR, 3.57; 95% CI, 1.35-9.42) but not MAFLD (HR, 0.84; 95% CI, 0.36-1.95).
“These data do not support the notion that a name change from NAFLD to MAFLD will better capture the risk for long-term outcomes of these patients or better define metabolically at-risk patients who present with FLD,” the investigators concluded. “On the other hand, enlarging the definition to FLD with subcategories of ‘alcoholic,’ ‘non-alcoholic,’ ‘drug-induced,’ etc. has merit and needs to be further considered. In this context, a true international consensus group of experts supported by liver and non-liver scientific societies must undertake an evidence-based and comprehensive approach to this issue and assess both the benefits and risks of changing the name.”
According to Rohit Loomba, MD, director of the NAFLD research center and professor of medicine in the division of gastroenterology and hepatology at University of California, San Diego, the study offers a preview of the consequences if NAFLD were changed to MAFLD, most notably by making alcohol a key driver of outcomes.
“If we change the name of a disease entity ... how does that impact natural history?” Dr. Loomba asked in an interview. “This paper gives you an idea. If you start calling it MAFLD, then people are dying from alcohol use, and they’re not dying from what we are currently seeing patients with NAFLD die of.”
He also noted that the name change could disrupt drug development and outcome measures since most drugs currently in development are directed at nonalcoholic steatohepatitis (NASH).
“Is it worth the headache?” Dr. Loomba asked. “How are we going to define NASH-related fibrosis? That probably will remain the same because the therapies that we will use to address that will remain consistent with what we are currently pursuing. ... It’s probably premature to change the nomenclature before assessing the impact on finding new treatment.”
Dr. Younossi disclosed relationships with BMS, Novartis, Gilead, and others. Dr. Loomba serves as a consultant to Aardvark Therapeutics, Altimmune, Anylam/Regeneron, Amgen, Arrowhead Pharmaceuticals, AstraZeneca, Bristol-Myer Squibb, CohBar, Eli Lilly, Galmed, Gilead, Glympse bio, Hightide, Inipharma, Intercept, Inventiva, Ionis, Janssen, Madrigal, Metacrine, NGM Biopharmaceuticals, Novartis, Novo Nordisk, Merck, Pfizer, Sagimet, Theratechnologies, 89 bio, Terns Pharmaceuticals, and Viking Therapeutics.
Non-alcoholic fatty liver disease (NAFLD) and metabolic associated fatty liver disease (MAFLD) demonstrate highly similar clinical courses and mortality rates, and a name change may not be clinically beneficial, based on data from more than 17,000 patients.
Instead, etiologic subcategorization of fatty liver disease (FLD) should be considered, reported lead author Zobair M. Younossi, MD, of Betty and Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, Va., and colleagues.
“There is debate about whether NAFLD is an appropriate name as the term ‘non-alcoholic’ overemphasizes the absence of alcohol use and underemphasizes the importance of the metabolic risk factors which are the main drivers of disease progression,” the investigators wrote in Hepatology. “It has been suggested that MAFLD may better reflect these risk factors. However, such a recommendation is made despite a lack of a general consensus on the definition of ‘metabolic health’ and disagreements in endocrinology circles about the term ‘metabolic syndrome.’ Nevertheless, a few investigators have suggested that MAFLD but not NAFLD is associated with increased fibrosis and mortality.”
To look for clinical differences between the two disease entities, Dr. Younossi and colleagues turned to the National Health and Nutrition Examination Survey (NHANES). Specifically, the NHANES III and NHANES 2017-2018 cohorts were employed, including 12,878 and 4,328 participants, respectively.
MAFLD was defined as FLD with overweight/obesity, evidence of metabolic dysregulation, or type 2 diabetes mellitus. NAFLD was defined as FLD without excessive alcohol consumption or other causes of chronic liver disease. Patients were sorted into four groups: NAFLD, MAFLD, both disease types, or neither disease type. Since the categories were not mutually exclusive, the investigators compared clinical characteristics based on 95% confidence intervals. If no overlap was found, then differences were deemed statistically significant.
Diagnoses of NAFLD and MAFLD were highly concordant (kappa coefficient = 0.83-0.94). After a median of 22.8 years follow-up, no significant differences were found between groups for cause-specific mortality, all-cause mortality, or major clinical characteristics except those inherent to the disease definitions (for example, lack of alcohol use in NAFLD). Greatest risk factors for advanced fibrosis in both groups were obesity, high-risk fibrosis, and type 2 diabetes mellitus.
As anticipated, by definition, alcoholic liver disease and excess alcohol use were documented in approximately 15% of patients with MAFLD, but in no patients with NAFLD. As such, alcoholic liver disease predicted liver-specific mortality for MAFLD (hazard ratio, 4.50; 95% confidence interval, 1.89-10.75) but not NAFLD. Conversely, insulin resistance predicted liver-specific mortality in NAFLD (HR, 3.57; 95% CI, 1.35-9.42) but not MAFLD (HR, 0.84; 95% CI, 0.36-1.95).
“These data do not support the notion that a name change from NAFLD to MAFLD will better capture the risk for long-term outcomes of these patients or better define metabolically at-risk patients who present with FLD,” the investigators concluded. “On the other hand, enlarging the definition to FLD with subcategories of ‘alcoholic,’ ‘non-alcoholic,’ ‘drug-induced,’ etc. has merit and needs to be further considered. In this context, a true international consensus group of experts supported by liver and non-liver scientific societies must undertake an evidence-based and comprehensive approach to this issue and assess both the benefits and risks of changing the name.”
According to Rohit Loomba, MD, director of the NAFLD research center and professor of medicine in the division of gastroenterology and hepatology at University of California, San Diego, the study offers a preview of the consequences if NAFLD were changed to MAFLD, most notably by making alcohol a key driver of outcomes.
“If we change the name of a disease entity ... how does that impact natural history?” Dr. Loomba asked in an interview. “This paper gives you an idea. If you start calling it MAFLD, then people are dying from alcohol use, and they’re not dying from what we are currently seeing patients with NAFLD die of.”
He also noted that the name change could disrupt drug development and outcome measures since most drugs currently in development are directed at nonalcoholic steatohepatitis (NASH).
“Is it worth the headache?” Dr. Loomba asked. “How are we going to define NASH-related fibrosis? That probably will remain the same because the therapies that we will use to address that will remain consistent with what we are currently pursuing. ... It’s probably premature to change the nomenclature before assessing the impact on finding new treatment.”
Dr. Younossi disclosed relationships with BMS, Novartis, Gilead, and others. Dr. Loomba serves as a consultant to Aardvark Therapeutics, Altimmune, Anylam/Regeneron, Amgen, Arrowhead Pharmaceuticals, AstraZeneca, Bristol-Myer Squibb, CohBar, Eli Lilly, Galmed, Gilead, Glympse bio, Hightide, Inipharma, Intercept, Inventiva, Ionis, Janssen, Madrigal, Metacrine, NGM Biopharmaceuticals, Novartis, Novo Nordisk, Merck, Pfizer, Sagimet, Theratechnologies, 89 bio, Terns Pharmaceuticals, and Viking Therapeutics.
FROM HEPATOLOGY
AGA Clinical Practice Update: Expert review of dietary options for IBS
The American Gastroenterological Association has published a clinical practice update on dietary interventions for patients with irritable bowel syndrome (IBS). The topics range from identification of suitable candidates for dietary interventions, to levels of evidence for specific diets, which are becoming increasingly recognized for their key role in managing patients with IBS, according to lead author William D. Chey, MD, of the University of Michigan, Ann Arbor, and colleagues.
“Most medical therapies for IBS improve global symptoms in fewer than one-half of patients, with a therapeutic gain of 7%-15% over placebo,” the researchers wrote in Gastroenterology. “Most patients with IBS associate their GI symptoms with eating food.”
According to Dr. Chey and colleagues, clinicians who are considering dietary modifications for treating IBS should first recognize the inherent challenges presented by this process and be aware that new diets won’t work for everyone.
“Specialty diets require planning and preparation, which may be impractical for some patients,” they wrote, noting that individuals with “decreased cognitive abilities and significant psychiatric disease” may be unable to follow diets or interpret their own responses to specific foods. Special diets may also be inappropriate for patients with financial constraints, and “should be avoided in patients with an eating disorder.”
Because of the challenges involved in dietary interventions, Dr. Chey and colleagues advised clinical support from a registered dietitian nutritionist or other resource.
Patients who are suitable candidates for intervention and willing to try a new diet should first provide information about their current eating habits. A food trial can then be personalized and implemented for a predetermined amount of time. If the patient does not respond, then the diet should be stopped and changed to a new diet or another intervention.
Dr. Chey and colleagues discussed three specific dietary interventions and their corresponding levels of evidence: soluble fiber; the low-fermentable oligo-, di-, and monosaccharides and polyols (FODMAP) diet; and a gluten-free diet.
“Soluble fiber is efficacious in treating global symptoms of IBS,” they wrote, citing 15 randomized controlled trials. Soluble fiber is most suitable for patients with constipation-predominant IBS, and different soluble fibers may yield different outcomes based on characteristics such as rate of fermentation and viscosity. In contrast, insoluble fiber is unlikely to help with IBS, and may worsen abdominal pain and bloating.
The low-FODMAP diet is “currently the most evidence-based diet intervention for IBS,” especially for patients with diarrhea-predominant IBS. Dr. Chey and colleagues offered a clear roadmap for employing the diet. First, patients should eat only low-FODMAP foods for 4-6 weeks. If symptoms don’t improve, the diet should be stopped. If symptoms do improve, foods containing a single FODMAP should be reintroduced one at a time, each in increasing quantities over 3 days, alongside documentation of symptom responses. Finally, the diet should be personalized based on these responses. The majority of patients (close to 80%) “can liberalize” a low-FODMAP diet based on their responses.
In contrast with the low-FODMAP diet, which has a relatively solid body of supporting evidence, efficacy data are still limited for treating IBS with a gluten-free diet. “Although observational studies found that most patients with IBS improve with a gluten-free diet, randomized controlled trials have yielded mixed results,” Dr. Chey and colleagues explained.
Their report cited a recent monograph on the topic that concluded that gluten-free eating offered no significant benefit over placebo (relative risk, 0.46; 95% confidence interval, 0.16-1.28). While some studies have documented positive results with a gluten-free diet, Dr. Chey and colleagues suggested that confounding variables such as the nocebo effect and the impact of other dietary factors have yet to be ruled out. “At present, it remains unclear whether a gluten-free diet is of benefit to patients with IBS.”
Dr. Chey and colleagues also explored IBS biomarkers. While some early data have shown that biomarkers may predict dietary responses, “there is insufficient evidence to support their routine use in clinical practice. ... Further efforts to identify and validate biomarkers that predict response to dietary interventions are needed to deliver ‘personalized nutrition.’ ”
The clinical practice update was commissioned and approved by the AGA CPU Committee and the AGA Governing Board. The researchers disclosed relationships with Biomerica, Salix, Mauna Kea Technologies, and others.
This article was updated May 19, 2022.
The American Gastroenterological Association has published a clinical practice update on dietary interventions for patients with irritable bowel syndrome (IBS). The topics range from identification of suitable candidates for dietary interventions, to levels of evidence for specific diets, which are becoming increasingly recognized for their key role in managing patients with IBS, according to lead author William D. Chey, MD, of the University of Michigan, Ann Arbor, and colleagues.
“Most medical therapies for IBS improve global symptoms in fewer than one-half of patients, with a therapeutic gain of 7%-15% over placebo,” the researchers wrote in Gastroenterology. “Most patients with IBS associate their GI symptoms with eating food.”
According to Dr. Chey and colleagues, clinicians who are considering dietary modifications for treating IBS should first recognize the inherent challenges presented by this process and be aware that new diets won’t work for everyone.
“Specialty diets require planning and preparation, which may be impractical for some patients,” they wrote, noting that individuals with “decreased cognitive abilities and significant psychiatric disease” may be unable to follow diets or interpret their own responses to specific foods. Special diets may also be inappropriate for patients with financial constraints, and “should be avoided in patients with an eating disorder.”
Because of the challenges involved in dietary interventions, Dr. Chey and colleagues advised clinical support from a registered dietitian nutritionist or other resource.
Patients who are suitable candidates for intervention and willing to try a new diet should first provide information about their current eating habits. A food trial can then be personalized and implemented for a predetermined amount of time. If the patient does not respond, then the diet should be stopped and changed to a new diet or another intervention.
Dr. Chey and colleagues discussed three specific dietary interventions and their corresponding levels of evidence: soluble fiber; the low-fermentable oligo-, di-, and monosaccharides and polyols (FODMAP) diet; and a gluten-free diet.
“Soluble fiber is efficacious in treating global symptoms of IBS,” they wrote, citing 15 randomized controlled trials. Soluble fiber is most suitable for patients with constipation-predominant IBS, and different soluble fibers may yield different outcomes based on characteristics such as rate of fermentation and viscosity. In contrast, insoluble fiber is unlikely to help with IBS, and may worsen abdominal pain and bloating.
The low-FODMAP diet is “currently the most evidence-based diet intervention for IBS,” especially for patients with diarrhea-predominant IBS. Dr. Chey and colleagues offered a clear roadmap for employing the diet. First, patients should eat only low-FODMAP foods for 4-6 weeks. If symptoms don’t improve, the diet should be stopped. If symptoms do improve, foods containing a single FODMAP should be reintroduced one at a time, each in increasing quantities over 3 days, alongside documentation of symptom responses. Finally, the diet should be personalized based on these responses. The majority of patients (close to 80%) “can liberalize” a low-FODMAP diet based on their responses.
In contrast with the low-FODMAP diet, which has a relatively solid body of supporting evidence, efficacy data are still limited for treating IBS with a gluten-free diet. “Although observational studies found that most patients with IBS improve with a gluten-free diet, randomized controlled trials have yielded mixed results,” Dr. Chey and colleagues explained.
Their report cited a recent monograph on the topic that concluded that gluten-free eating offered no significant benefit over placebo (relative risk, 0.46; 95% confidence interval, 0.16-1.28). While some studies have documented positive results with a gluten-free diet, Dr. Chey and colleagues suggested that confounding variables such as the nocebo effect and the impact of other dietary factors have yet to be ruled out. “At present, it remains unclear whether a gluten-free diet is of benefit to patients with IBS.”
Dr. Chey and colleagues also explored IBS biomarkers. While some early data have shown that biomarkers may predict dietary responses, “there is insufficient evidence to support their routine use in clinical practice. ... Further efforts to identify and validate biomarkers that predict response to dietary interventions are needed to deliver ‘personalized nutrition.’ ”
The clinical practice update was commissioned and approved by the AGA CPU Committee and the AGA Governing Board. The researchers disclosed relationships with Biomerica, Salix, Mauna Kea Technologies, and others.
This article was updated May 19, 2022.
The American Gastroenterological Association has published a clinical practice update on dietary interventions for patients with irritable bowel syndrome (IBS). The topics range from identification of suitable candidates for dietary interventions, to levels of evidence for specific diets, which are becoming increasingly recognized for their key role in managing patients with IBS, according to lead author William D. Chey, MD, of the University of Michigan, Ann Arbor, and colleagues.
“Most medical therapies for IBS improve global symptoms in fewer than one-half of patients, with a therapeutic gain of 7%-15% over placebo,” the researchers wrote in Gastroenterology. “Most patients with IBS associate their GI symptoms with eating food.”
According to Dr. Chey and colleagues, clinicians who are considering dietary modifications for treating IBS should first recognize the inherent challenges presented by this process and be aware that new diets won’t work for everyone.
“Specialty diets require planning and preparation, which may be impractical for some patients,” they wrote, noting that individuals with “decreased cognitive abilities and significant psychiatric disease” may be unable to follow diets or interpret their own responses to specific foods. Special diets may also be inappropriate for patients with financial constraints, and “should be avoided in patients with an eating disorder.”
Because of the challenges involved in dietary interventions, Dr. Chey and colleagues advised clinical support from a registered dietitian nutritionist or other resource.
Patients who are suitable candidates for intervention and willing to try a new diet should first provide information about their current eating habits. A food trial can then be personalized and implemented for a predetermined amount of time. If the patient does not respond, then the diet should be stopped and changed to a new diet or another intervention.
Dr. Chey and colleagues discussed three specific dietary interventions and their corresponding levels of evidence: soluble fiber; the low-fermentable oligo-, di-, and monosaccharides and polyols (FODMAP) diet; and a gluten-free diet.
“Soluble fiber is efficacious in treating global symptoms of IBS,” they wrote, citing 15 randomized controlled trials. Soluble fiber is most suitable for patients with constipation-predominant IBS, and different soluble fibers may yield different outcomes based on characteristics such as rate of fermentation and viscosity. In contrast, insoluble fiber is unlikely to help with IBS, and may worsen abdominal pain and bloating.
The low-FODMAP diet is “currently the most evidence-based diet intervention for IBS,” especially for patients with diarrhea-predominant IBS. Dr. Chey and colleagues offered a clear roadmap for employing the diet. First, patients should eat only low-FODMAP foods for 4-6 weeks. If symptoms don’t improve, the diet should be stopped. If symptoms do improve, foods containing a single FODMAP should be reintroduced one at a time, each in increasing quantities over 3 days, alongside documentation of symptom responses. Finally, the diet should be personalized based on these responses. The majority of patients (close to 80%) “can liberalize” a low-FODMAP diet based on their responses.
In contrast with the low-FODMAP diet, which has a relatively solid body of supporting evidence, efficacy data are still limited for treating IBS with a gluten-free diet. “Although observational studies found that most patients with IBS improve with a gluten-free diet, randomized controlled trials have yielded mixed results,” Dr. Chey and colleagues explained.
Their report cited a recent monograph on the topic that concluded that gluten-free eating offered no significant benefit over placebo (relative risk, 0.46; 95% confidence interval, 0.16-1.28). While some studies have documented positive results with a gluten-free diet, Dr. Chey and colleagues suggested that confounding variables such as the nocebo effect and the impact of other dietary factors have yet to be ruled out. “At present, it remains unclear whether a gluten-free diet is of benefit to patients with IBS.”
Dr. Chey and colleagues also explored IBS biomarkers. While some early data have shown that biomarkers may predict dietary responses, “there is insufficient evidence to support their routine use in clinical practice. ... Further efforts to identify and validate biomarkers that predict response to dietary interventions are needed to deliver ‘personalized nutrition.’ ”
The clinical practice update was commissioned and approved by the AGA CPU Committee and the AGA Governing Board. The researchers disclosed relationships with Biomerica, Salix, Mauna Kea Technologies, and others.
This article was updated May 19, 2022.
FROM GASTROENTEROLOGY
Study casts doubt on safety, efficacy of L-serine supplementation for AD
When given to patients with AD, L-serine supplements could be driving abnormally increased serine levels in the brain even higher, potentially accelerating neuronal death, according to study author Xu Chen, PhD, of the University of California, San Diego, and colleagues.
This conclusion conflicts with a 2020 study by Juliette Le Douce, PhD, and colleagues, who reported that oral L-serine supplementation may act as a “ready-to-use therapy” for AD, based on their findings that patients with AD had low levels of PHGDH, an enzyme necessary for synthesizing serine, and AD-like mice had low levels of serine.
Writing in Cell Metabolism, Dr. Chen and colleagues framed the present study, and their findings, in this context.
“In contrast to the work of Le Douce et al., here we report that PHGDH mRNA and protein levels are increased in the brains of two mouse models of AD and/or tauopathy, and are also progressively increased in human brains with no, early, and late AD pathology, as well as in people with no, asymptomatic, and symptomatic AD,” they wrote.
They suggested adjusting clinical recommendations for L-serine, the form of the amino acid commonly found in supplements. In the body, L-serine is converted to D-serine, which acts on the NMDA receptor (NMDAR).
‘Long-term use of D-serine contributes to neuronal death’ suggests research
“We feel oral L-serine as a ready-to-use therapy to AD warrants precaution,” Dr. Chen and colleagues wrote. “This is because despite being a cognitive enhancer, some [research] suggests that long-term use of D-serine contributes to neuronal death in AD through excitotoxicity. Furthermore, D-serine, as a co-agonist of NMDAR, would be expected to oppose NMDAR antagonists, which have proven clinical benefits in treating AD.”
According to principal author Sheng Zhong, PhD, of the University of California, San Diego, “Research is needed to test if targeting PHGDH can ameliorate cognitive decline in AD.”
Dr. Zhong also noted that the present findings support the “promise of using a specific RNA in blood as a biomarker for early detection of Alzheimer’s disease.” This approach is currently being validated at UCSD Shiley-Marcos Alzheimer’s Disease Research Center, he added.
Roles of PHGDH and serine in Alzheimer’s disease require further study
Commenting on both studies, Steve W. Barger, PhD, of the University of Arkansas for Medical Sciences, Little Rock, suggested that more work is needed to better understand the roles of PHGDH and serine in AD before clinical applications can be considered.
“In the end, these two studies fail to provide the clarity we need in designing evidence-based therapeutic hypotheses,” Dr. Barger said in an interview. “We still do not have a firm grasp on the role that D-serine plays in AD. Indeed, the evidence regarding even a single enzyme contributing to its levels is ambiguous.”
Dr. Barger, who has published extensively on the topic of neuronal death, with a particular focus on Alzheimer’s disease, noted that “determination of what happens to D-serine levels in AD has been of interest for decades,” but levels of the amino acid have been notoriously challenging to measure because “D-serine can disappear rapidly from the brain and its fluids after death.”
While Dr. Le Douce and colleagues did measure levels of serine in mice, Dr. Barger noted that the study by Dr. Chen and colleagues was conducted with more “quantitatively rigorous methods.” Even though Dr. Chen and colleagues “did not assay the levels of D-serine itself ... the implication of their findings is that PHGDH is poised to elevate this critical neurotransmitter,” leading to their conclusion that serine supplementation is “potentially dangerous.”
At this point, it may be too early to tell, according to Dr. Barger.
He suggested that conclusions drawn from PHGDH levels alone are “always limited,” and conclusions based on serine levels may be equally dubious, considering that the activities and effects of serine “are quite complex,” and may be influenced by other physiologic processes, including the effects of gut bacteria.
Instead, Dr. Barger suggested that changes in PHGDH and serine may be interpreted as signals coming from a more relevant process upstream: glucose metabolism.
“What we can say confidently is that the glucose metabolism that PHGDH connects to D-serine is most definitely a factor in AD,” he said. “Countless studies have documented what now appears to be a universal decline in glucose delivery to the cerebral cortex, even before frank dementia sets in.”
Dr. Barger noted that declining glucose delivery coincides with some of the earliest events in the development of AD, perhaps “linking accumulation of amyloid β-peptide to subsequent neurofibrillary tangles and tissue atrophy.”
Dr. Barger’s own work recently demonstrated that AD is associated with “an irregularity in the insertion of a specific glucose transporter (GLUT1) into the cell surface” of astrocytes.
“It could be more effective to direct therapeutic interventions at these events lying upstream of PHGDH or serine,” he concluded.
The study was partly supported by a Kreuger v. Wyeth research award. The investigators and Dr. Barger reported no conflicts of interest.
When given to patients with AD, L-serine supplements could be driving abnormally increased serine levels in the brain even higher, potentially accelerating neuronal death, according to study author Xu Chen, PhD, of the University of California, San Diego, and colleagues.
This conclusion conflicts with a 2020 study by Juliette Le Douce, PhD, and colleagues, who reported that oral L-serine supplementation may act as a “ready-to-use therapy” for AD, based on their findings that patients with AD had low levels of PHGDH, an enzyme necessary for synthesizing serine, and AD-like mice had low levels of serine.
Writing in Cell Metabolism, Dr. Chen and colleagues framed the present study, and their findings, in this context.
“In contrast to the work of Le Douce et al., here we report that PHGDH mRNA and protein levels are increased in the brains of two mouse models of AD and/or tauopathy, and are also progressively increased in human brains with no, early, and late AD pathology, as well as in people with no, asymptomatic, and symptomatic AD,” they wrote.
They suggested adjusting clinical recommendations for L-serine, the form of the amino acid commonly found in supplements. In the body, L-serine is converted to D-serine, which acts on the NMDA receptor (NMDAR).
‘Long-term use of D-serine contributes to neuronal death’ suggests research
“We feel oral L-serine as a ready-to-use therapy to AD warrants precaution,” Dr. Chen and colleagues wrote. “This is because despite being a cognitive enhancer, some [research] suggests that long-term use of D-serine contributes to neuronal death in AD through excitotoxicity. Furthermore, D-serine, as a co-agonist of NMDAR, would be expected to oppose NMDAR antagonists, which have proven clinical benefits in treating AD.”
According to principal author Sheng Zhong, PhD, of the University of California, San Diego, “Research is needed to test if targeting PHGDH can ameliorate cognitive decline in AD.”
Dr. Zhong also noted that the present findings support the “promise of using a specific RNA in blood as a biomarker for early detection of Alzheimer’s disease.” This approach is currently being validated at UCSD Shiley-Marcos Alzheimer’s Disease Research Center, he added.
Roles of PHGDH and serine in Alzheimer’s disease require further study
Commenting on both studies, Steve W. Barger, PhD, of the University of Arkansas for Medical Sciences, Little Rock, suggested that more work is needed to better understand the roles of PHGDH and serine in AD before clinical applications can be considered.
“In the end, these two studies fail to provide the clarity we need in designing evidence-based therapeutic hypotheses,” Dr. Barger said in an interview. “We still do not have a firm grasp on the role that D-serine plays in AD. Indeed, the evidence regarding even a single enzyme contributing to its levels is ambiguous.”
Dr. Barger, who has published extensively on the topic of neuronal death, with a particular focus on Alzheimer’s disease, noted that “determination of what happens to D-serine levels in AD has been of interest for decades,” but levels of the amino acid have been notoriously challenging to measure because “D-serine can disappear rapidly from the brain and its fluids after death.”
While Dr. Le Douce and colleagues did measure levels of serine in mice, Dr. Barger noted that the study by Dr. Chen and colleagues was conducted with more “quantitatively rigorous methods.” Even though Dr. Chen and colleagues “did not assay the levels of D-serine itself ... the implication of their findings is that PHGDH is poised to elevate this critical neurotransmitter,” leading to their conclusion that serine supplementation is “potentially dangerous.”
At this point, it may be too early to tell, according to Dr. Barger.
He suggested that conclusions drawn from PHGDH levels alone are “always limited,” and conclusions based on serine levels may be equally dubious, considering that the activities and effects of serine “are quite complex,” and may be influenced by other physiologic processes, including the effects of gut bacteria.
Instead, Dr. Barger suggested that changes in PHGDH and serine may be interpreted as signals coming from a more relevant process upstream: glucose metabolism.
“What we can say confidently is that the glucose metabolism that PHGDH connects to D-serine is most definitely a factor in AD,” he said. “Countless studies have documented what now appears to be a universal decline in glucose delivery to the cerebral cortex, even before frank dementia sets in.”
Dr. Barger noted that declining glucose delivery coincides with some of the earliest events in the development of AD, perhaps “linking accumulation of amyloid β-peptide to subsequent neurofibrillary tangles and tissue atrophy.”
Dr. Barger’s own work recently demonstrated that AD is associated with “an irregularity in the insertion of a specific glucose transporter (GLUT1) into the cell surface” of astrocytes.
“It could be more effective to direct therapeutic interventions at these events lying upstream of PHGDH or serine,” he concluded.
The study was partly supported by a Kreuger v. Wyeth research award. The investigators and Dr. Barger reported no conflicts of interest.
When given to patients with AD, L-serine supplements could be driving abnormally increased serine levels in the brain even higher, potentially accelerating neuronal death, according to study author Xu Chen, PhD, of the University of California, San Diego, and colleagues.
This conclusion conflicts with a 2020 study by Juliette Le Douce, PhD, and colleagues, who reported that oral L-serine supplementation may act as a “ready-to-use therapy” for AD, based on their findings that patients with AD had low levels of PHGDH, an enzyme necessary for synthesizing serine, and AD-like mice had low levels of serine.
Writing in Cell Metabolism, Dr. Chen and colleagues framed the present study, and their findings, in this context.
“In contrast to the work of Le Douce et al., here we report that PHGDH mRNA and protein levels are increased in the brains of two mouse models of AD and/or tauopathy, and are also progressively increased in human brains with no, early, and late AD pathology, as well as in people with no, asymptomatic, and symptomatic AD,” they wrote.
They suggested adjusting clinical recommendations for L-serine, the form of the amino acid commonly found in supplements. In the body, L-serine is converted to D-serine, which acts on the NMDA receptor (NMDAR).
‘Long-term use of D-serine contributes to neuronal death’ suggests research
“We feel oral L-serine as a ready-to-use therapy to AD warrants precaution,” Dr. Chen and colleagues wrote. “This is because despite being a cognitive enhancer, some [research] suggests that long-term use of D-serine contributes to neuronal death in AD through excitotoxicity. Furthermore, D-serine, as a co-agonist of NMDAR, would be expected to oppose NMDAR antagonists, which have proven clinical benefits in treating AD.”
According to principal author Sheng Zhong, PhD, of the University of California, San Diego, “Research is needed to test if targeting PHGDH can ameliorate cognitive decline in AD.”
Dr. Zhong also noted that the present findings support the “promise of using a specific RNA in blood as a biomarker for early detection of Alzheimer’s disease.” This approach is currently being validated at UCSD Shiley-Marcos Alzheimer’s Disease Research Center, he added.
Roles of PHGDH and serine in Alzheimer’s disease require further study
Commenting on both studies, Steve W. Barger, PhD, of the University of Arkansas for Medical Sciences, Little Rock, suggested that more work is needed to better understand the roles of PHGDH and serine in AD before clinical applications can be considered.
“In the end, these two studies fail to provide the clarity we need in designing evidence-based therapeutic hypotheses,” Dr. Barger said in an interview. “We still do not have a firm grasp on the role that D-serine plays in AD. Indeed, the evidence regarding even a single enzyme contributing to its levels is ambiguous.”
Dr. Barger, who has published extensively on the topic of neuronal death, with a particular focus on Alzheimer’s disease, noted that “determination of what happens to D-serine levels in AD has been of interest for decades,” but levels of the amino acid have been notoriously challenging to measure because “D-serine can disappear rapidly from the brain and its fluids after death.”
While Dr. Le Douce and colleagues did measure levels of serine in mice, Dr. Barger noted that the study by Dr. Chen and colleagues was conducted with more “quantitatively rigorous methods.” Even though Dr. Chen and colleagues “did not assay the levels of D-serine itself ... the implication of their findings is that PHGDH is poised to elevate this critical neurotransmitter,” leading to their conclusion that serine supplementation is “potentially dangerous.”
At this point, it may be too early to tell, according to Dr. Barger.
He suggested that conclusions drawn from PHGDH levels alone are “always limited,” and conclusions based on serine levels may be equally dubious, considering that the activities and effects of serine “are quite complex,” and may be influenced by other physiologic processes, including the effects of gut bacteria.
Instead, Dr. Barger suggested that changes in PHGDH and serine may be interpreted as signals coming from a more relevant process upstream: glucose metabolism.
“What we can say confidently is that the glucose metabolism that PHGDH connects to D-serine is most definitely a factor in AD,” he said. “Countless studies have documented what now appears to be a universal decline in glucose delivery to the cerebral cortex, even before frank dementia sets in.”
Dr. Barger noted that declining glucose delivery coincides with some of the earliest events in the development of AD, perhaps “linking accumulation of amyloid β-peptide to subsequent neurofibrillary tangles and tissue atrophy.”
Dr. Barger’s own work recently demonstrated that AD is associated with “an irregularity in the insertion of a specific glucose transporter (GLUT1) into the cell surface” of astrocytes.
“It could be more effective to direct therapeutic interventions at these events lying upstream of PHGDH or serine,” he concluded.
The study was partly supported by a Kreuger v. Wyeth research award. The investigators and Dr. Barger reported no conflicts of interest.
FROM CELL METABOLISM
Cellular gene profiling may predict IBD treatment response
Transcriptomic profiling of phagocytes in the lamina propria of patients with inflammatory bowel disease (IBD) may guide future treatment selection, according to investigators.
Mucosal gut biopsies revealed that phagocytic gene expression correlated with inflammatory states, types of IBD, and responses to therapy, lead author Gillian E. Jacobsen a MD/PhD candidate at the University of Miami and colleagues reported.
In an article in Gastro Hep Advances, the investigators wrote that “lamina propria phagocytes along with epithelial cells represent a first line of defense and play a balancing act between tolerance toward commensal microbes and generation of immune responses toward pathogenic microorganisms. ... Inappropriate responses by lamina propria phagocytes have been linked to IBD.”
To better understand these responses, the researchers collected 111 gut mucosal biopsies from 54 patients with IBD, among whom 59% were taking biologics, 72% had inflammation in at least one biopsy site, and 41% had previously used at least one other biologic. Samples were analyzed to determine cell phenotypes, gene expression, and cytokine responses to in vitro Janus kinase (JAK) inhibitor exposure.
Ms. Jacobsen and colleagues noted that most reports that address the function of phagocytes focus on circulating dendritic cells, monocytes, or monocyte-derived macrophages, rather than on resident phagocyte populations located in the lamina propria. However, these circulating cells “do not reflect intestinal inflammation, or whole tissue biopsies.”
Phagocytes based on CD11b expression and phenotyped CD11b+-enriched cells using flow cytometry were identified. In samples with active inflammation, cells were most often granulocytes (45.5%), followed by macrophages (22.6%) and monocytes (9.4%). Uninflamed samples had a slightly lower proportion of granulocytes (33.6%), about the same proportion of macrophages (22.7%), and a higher rate of B cells (15.6% vs. 9.0%).
Ms. Jacobsen and colleagues highlighted the absolute uptick in granulocytes, including neutrophils.
“Neutrophilic infiltration is a major indicator of IBD activity and may be critically linked to ongoing inflammation,” they wrote. “These data demonstrate that CD11b+ enrichment reflects the inflammatory state of the biopsies.”
The investigators also showed that transcriptional profiles of lamina propria CD11b+ cells differed “greatly” between colon and ileum, which suggested that “the location or cellular environment plays a marked role in determining the gene expression of phagocytes.”
CD11b+ cell gene expression profiles also correlated with ulcerative colitis versus Crohn’s disease, although the researchers noted that these patterns were less pronounced than correlations with inflammatory states
“There are pathways common to inflammation regardless of the IBD type that could be used as markers of inflammation or targets for therapy.”
Comparing colon samples from patients who responded to anti–tumor necrosis factor therapy with those who were refractory to anti-TNF therapy revealed significant associations between response type and 52 differentially expressed genes.
“These genes were mostly immunoglobulin genes up-regulated in the anti–TNF-treated inflamed colon, suggesting that CD11b+ B cells may play a role in medication refractoriness.”
Evaluating inflamed colon and anti-TNF refractory ileum revealed differential expression of OSM, a known marker of TNF-resistant disease, as well as TREM1, a proinflammatory marker. In contrast, NTS genes showed high expression in uninflamed samples on anti-TNF therapy. The researchers noted that these findings “may be used to build precision medicine approaches in IBD.”
Further experiments showed that in vitro exposure of anti-TNF refractory samples to JAK inhibitors resulted in significantly reduced secretion of interleukin-8 and TNF-alpha.
“Our study provides functional data that JAK inhibition with tofacitinib (JAK1/JAK3) or ruxolitinib (JAK1/JAK2) inhibits lipopolysaccharide-induced cytokine production even in TNF-refractory samples,” the researchers wrote. “These data inform the response of patients to JAK inhibitors, including those refractory to other treatments.”
The study was supported by Pfizer, the National Institute of Diabetes and Digestive and Kidney Diseases, the Micky & Madeleine Arison Family Foundation Crohn’s & Colitis Discovery Laboratory, and Martin Kalser Chair in Gastroenterology at the University of Miami. The investigators disclosed additional relationships with Takeda, Abbvie, Eli Lilly, and others.
Inflammatory bowel diseases are complex and heterogenous disorders driven by inappropriate immune responses to luminal substances, including diet and microbes, resulting in chronic inflammation of the gastrointestinal tract. Therapies for IBD largely center around suppressing immune responses; however, given the complexity and heterogeneity of these diseases, consensus on which aspect of the immune response to suppress and which cell type to target in a given patient is unclear.
Sreeram Udayan, PhD, and Rodney D. Newberry, MD, are with the division of gastroenterology in the department of medicine at Washington University, St. Louis.
Inflammatory bowel diseases are complex and heterogenous disorders driven by inappropriate immune responses to luminal substances, including diet and microbes, resulting in chronic inflammation of the gastrointestinal tract. Therapies for IBD largely center around suppressing immune responses; however, given the complexity and heterogeneity of these diseases, consensus on which aspect of the immune response to suppress and which cell type to target in a given patient is unclear.
Sreeram Udayan, PhD, and Rodney D. Newberry, MD, are with the division of gastroenterology in the department of medicine at Washington University, St. Louis.
Inflammatory bowel diseases are complex and heterogenous disorders driven by inappropriate immune responses to luminal substances, including diet and microbes, resulting in chronic inflammation of the gastrointestinal tract. Therapies for IBD largely center around suppressing immune responses; however, given the complexity and heterogeneity of these diseases, consensus on which aspect of the immune response to suppress and which cell type to target in a given patient is unclear.
Sreeram Udayan, PhD, and Rodney D. Newberry, MD, are with the division of gastroenterology in the department of medicine at Washington University, St. Louis.
Transcriptomic profiling of phagocytes in the lamina propria of patients with inflammatory bowel disease (IBD) may guide future treatment selection, according to investigators.
Mucosal gut biopsies revealed that phagocytic gene expression correlated with inflammatory states, types of IBD, and responses to therapy, lead author Gillian E. Jacobsen a MD/PhD candidate at the University of Miami and colleagues reported.
In an article in Gastro Hep Advances, the investigators wrote that “lamina propria phagocytes along with epithelial cells represent a first line of defense and play a balancing act between tolerance toward commensal microbes and generation of immune responses toward pathogenic microorganisms. ... Inappropriate responses by lamina propria phagocytes have been linked to IBD.”
To better understand these responses, the researchers collected 111 gut mucosal biopsies from 54 patients with IBD, among whom 59% were taking biologics, 72% had inflammation in at least one biopsy site, and 41% had previously used at least one other biologic. Samples were analyzed to determine cell phenotypes, gene expression, and cytokine responses to in vitro Janus kinase (JAK) inhibitor exposure.
Ms. Jacobsen and colleagues noted that most reports that address the function of phagocytes focus on circulating dendritic cells, monocytes, or monocyte-derived macrophages, rather than on resident phagocyte populations located in the lamina propria. However, these circulating cells “do not reflect intestinal inflammation, or whole tissue biopsies.”
Phagocytes based on CD11b expression and phenotyped CD11b+-enriched cells using flow cytometry were identified. In samples with active inflammation, cells were most often granulocytes (45.5%), followed by macrophages (22.6%) and monocytes (9.4%). Uninflamed samples had a slightly lower proportion of granulocytes (33.6%), about the same proportion of macrophages (22.7%), and a higher rate of B cells (15.6% vs. 9.0%).
Ms. Jacobsen and colleagues highlighted the absolute uptick in granulocytes, including neutrophils.
“Neutrophilic infiltration is a major indicator of IBD activity and may be critically linked to ongoing inflammation,” they wrote. “These data demonstrate that CD11b+ enrichment reflects the inflammatory state of the biopsies.”
The investigators also showed that transcriptional profiles of lamina propria CD11b+ cells differed “greatly” between colon and ileum, which suggested that “the location or cellular environment plays a marked role in determining the gene expression of phagocytes.”
CD11b+ cell gene expression profiles also correlated with ulcerative colitis versus Crohn’s disease, although the researchers noted that these patterns were less pronounced than correlations with inflammatory states
“There are pathways common to inflammation regardless of the IBD type that could be used as markers of inflammation or targets for therapy.”
Comparing colon samples from patients who responded to anti–tumor necrosis factor therapy with those who were refractory to anti-TNF therapy revealed significant associations between response type and 52 differentially expressed genes.
“These genes were mostly immunoglobulin genes up-regulated in the anti–TNF-treated inflamed colon, suggesting that CD11b+ B cells may play a role in medication refractoriness.”
Evaluating inflamed colon and anti-TNF refractory ileum revealed differential expression of OSM, a known marker of TNF-resistant disease, as well as TREM1, a proinflammatory marker. In contrast, NTS genes showed high expression in uninflamed samples on anti-TNF therapy. The researchers noted that these findings “may be used to build precision medicine approaches in IBD.”
Further experiments showed that in vitro exposure of anti-TNF refractory samples to JAK inhibitors resulted in significantly reduced secretion of interleukin-8 and TNF-alpha.
“Our study provides functional data that JAK inhibition with tofacitinib (JAK1/JAK3) or ruxolitinib (JAK1/JAK2) inhibits lipopolysaccharide-induced cytokine production even in TNF-refractory samples,” the researchers wrote. “These data inform the response of patients to JAK inhibitors, including those refractory to other treatments.”
The study was supported by Pfizer, the National Institute of Diabetes and Digestive and Kidney Diseases, the Micky & Madeleine Arison Family Foundation Crohn’s & Colitis Discovery Laboratory, and Martin Kalser Chair in Gastroenterology at the University of Miami. The investigators disclosed additional relationships with Takeda, Abbvie, Eli Lilly, and others.
Transcriptomic profiling of phagocytes in the lamina propria of patients with inflammatory bowel disease (IBD) may guide future treatment selection, according to investigators.
Mucosal gut biopsies revealed that phagocytic gene expression correlated with inflammatory states, types of IBD, and responses to therapy, lead author Gillian E. Jacobsen a MD/PhD candidate at the University of Miami and colleagues reported.
In an article in Gastro Hep Advances, the investigators wrote that “lamina propria phagocytes along with epithelial cells represent a first line of defense and play a balancing act between tolerance toward commensal microbes and generation of immune responses toward pathogenic microorganisms. ... Inappropriate responses by lamina propria phagocytes have been linked to IBD.”
To better understand these responses, the researchers collected 111 gut mucosal biopsies from 54 patients with IBD, among whom 59% were taking biologics, 72% had inflammation in at least one biopsy site, and 41% had previously used at least one other biologic. Samples were analyzed to determine cell phenotypes, gene expression, and cytokine responses to in vitro Janus kinase (JAK) inhibitor exposure.
Ms. Jacobsen and colleagues noted that most reports that address the function of phagocytes focus on circulating dendritic cells, monocytes, or monocyte-derived macrophages, rather than on resident phagocyte populations located in the lamina propria. However, these circulating cells “do not reflect intestinal inflammation, or whole tissue biopsies.”
Phagocytes based on CD11b expression and phenotyped CD11b+-enriched cells using flow cytometry were identified. In samples with active inflammation, cells were most often granulocytes (45.5%), followed by macrophages (22.6%) and monocytes (9.4%). Uninflamed samples had a slightly lower proportion of granulocytes (33.6%), about the same proportion of macrophages (22.7%), and a higher rate of B cells (15.6% vs. 9.0%).
Ms. Jacobsen and colleagues highlighted the absolute uptick in granulocytes, including neutrophils.
“Neutrophilic infiltration is a major indicator of IBD activity and may be critically linked to ongoing inflammation,” they wrote. “These data demonstrate that CD11b+ enrichment reflects the inflammatory state of the biopsies.”
The investigators also showed that transcriptional profiles of lamina propria CD11b+ cells differed “greatly” between colon and ileum, which suggested that “the location or cellular environment plays a marked role in determining the gene expression of phagocytes.”
CD11b+ cell gene expression profiles also correlated with ulcerative colitis versus Crohn’s disease, although the researchers noted that these patterns were less pronounced than correlations with inflammatory states
“There are pathways common to inflammation regardless of the IBD type that could be used as markers of inflammation or targets for therapy.”
Comparing colon samples from patients who responded to anti–tumor necrosis factor therapy with those who were refractory to anti-TNF therapy revealed significant associations between response type and 52 differentially expressed genes.
“These genes were mostly immunoglobulin genes up-regulated in the anti–TNF-treated inflamed colon, suggesting that CD11b+ B cells may play a role in medication refractoriness.”
Evaluating inflamed colon and anti-TNF refractory ileum revealed differential expression of OSM, a known marker of TNF-resistant disease, as well as TREM1, a proinflammatory marker. In contrast, NTS genes showed high expression in uninflamed samples on anti-TNF therapy. The researchers noted that these findings “may be used to build precision medicine approaches in IBD.”
Further experiments showed that in vitro exposure of anti-TNF refractory samples to JAK inhibitors resulted in significantly reduced secretion of interleukin-8 and TNF-alpha.
“Our study provides functional data that JAK inhibition with tofacitinib (JAK1/JAK3) or ruxolitinib (JAK1/JAK2) inhibits lipopolysaccharide-induced cytokine production even in TNF-refractory samples,” the researchers wrote. “These data inform the response of patients to JAK inhibitors, including those refractory to other treatments.”
The study was supported by Pfizer, the National Institute of Diabetes and Digestive and Kidney Diseases, the Micky & Madeleine Arison Family Foundation Crohn’s & Colitis Discovery Laboratory, and Martin Kalser Chair in Gastroenterology at the University of Miami. The investigators disclosed additional relationships with Takeda, Abbvie, Eli Lilly, and others.
FROM GASTRO HEP ADVANCES
Deep learning system outmatches pathologists in diagnosing liver lesions
A new deep learning system can classify hepatocellular nodular lesions (HNLs) via whole-slide images, improving risk stratification of patients and diagnostic rate of hepatocellular carcinoma (HCC), according to investigators.
While the model requires further validation, it could eventually be used to optimize accuracy and efficiency of histologic diagnoses, potentially decreasing reliance on pathologists, particularly in areas with limited access to subspecialists.
In an article published in Gastroenterology, Na Cheng, MD, of Sun Yat-sen University, Guangzhou, China, and colleagues wrote that the “diagnostic process [for HNLs] is laborious, time-consuming, and subject to the experience of the pathologists, often with significant interobserver and intraobserver variability. ... Therefore, [an] automated analysis system is highly demanded in the pathology field, which could considerably ease the workload, speed up the diagnosis, and facilitate the in-time treatment.”
To this end, Dr. Cheng and colleagues developed the hepatocellular-nodular artificial intelligence model (HnAIM) that can scan whole-image slides to identify seven types of tissue: well-differentiated HCC, high-grade dysplastic nodules, low-grade dysplastic nodules, hepatocellular adenoma, focal nodular hyperplasia, and background tissue.
Developing and testing HnAIM was a multistep process that began with three subspecialist pathologists, who independently reviewed and classified liver slides from surgical resection. Unanimous agreement was achieved in 649 slides from 462 patients. These slides were then scanned to create whole-slide images, which were divided into sets for training (70%), validation (15%), and internal testing (15%). Accuracy, measured by area under the curve (AUC), was over 99.9% for the internal testing set. The accuracy of HnAIM was independently, externally validated.
First, HnAIM evaluated liver biopsy slides from 30 patients at one center. Results were compared with diagnoses made by nine pathologists classified as either senior, intermediate, or junior. While HnAIM correctly diagnosed 100% of the cases, senior pathologists correctly diagnosed 94.4% of the cases, followed in accuracy by intermediate (86.7%) and junior (73.3%) pathologists.
The researchers noted that the “rate of agreement with subspecialists was higher for HnAIM than for all 9 pathologists at distinguishing 7 liver tissues, with important diagnostic implications for fragmentary or scarce biopsy specimens.”
Next, HnAIM evaluated 234 samples from three hospitals. Accuracy was slightly lower, with an AUC of 93.5%. The researchers highlighted how HnAIM consistently differentiated precancerous lesions and well-defined HCC from benign lesions and background tissues.
A final experiment showed how HnAIM reacted to the most challenging cases. The investigators selected 12 cases without definitive diagnoses and found that, similar to the findings of three subspecialist pathologists, HnAIM did not reach a single diagnostic conclusion.
The researchers reported that “This may be due to a number of potential reasons, such as inherent uncertainty in the 2-dimensional interpretation of a 3-dimensional specimen, the limited number of tissue samples, and cognitive factors such as anchoring.”
However, HnAIM contributed to the diagnostic process by generating multiple diagnostic possibilities with weighted likelihood. After reviewing these results, the expert pathologists reached consensus in 5 out of 12 cases. Moreover, two out of three expert pathologists agreed on all 12 cases, improving agreement rate from 25% to 100%.
The researchers concluded that the model holds the promise to facilitate human HNL diagnoses and improve efficiency and quality. It can also reduce the workload of pathologists, especially where subspecialists are unavailable.
The study was supported by the National Natural Science Foundation of China, the Guangdong Basic and Applied Basic Research Foundation, the Natural Science Foundation of Guangdong Province, and others. The investigators reported no conflicts of interest.
As the prevalence of hepatocellular carcinoma (HCC) continues to rise, the early and accurate detection and diagnosis of HCC remains paramount to improving patient outcomes. In cases of typical or advanced HCC, an accurate diagnosis is made using CT or MR imaging. However, hepatocellular nodular lesions (HNLs) with atypical or inconclusive radiographic appearances are often biopsied to achieve a histopathologic diagnosis. In addition, accurate diagnosis of an HNL following liver resection or transplantation is important to long-term surveillance and management. An accurate histopathologic diagnosis relies on the availability of experienced subspecialty pathologists and remains a costly and labor-intensive process that can lead to delays in diagnosis and care.
Hannah P. Kim, MD, MSCR, is an assistant professor in the division of gastroenterology, hepatology, and nutrition in the department of medicine at Vanderbilt University Medical Center, Nashville, Tenn. She has no conflicts of interest.
As the prevalence of hepatocellular carcinoma (HCC) continues to rise, the early and accurate detection and diagnosis of HCC remains paramount to improving patient outcomes. In cases of typical or advanced HCC, an accurate diagnosis is made using CT or MR imaging. However, hepatocellular nodular lesions (HNLs) with atypical or inconclusive radiographic appearances are often biopsied to achieve a histopathologic diagnosis. In addition, accurate diagnosis of an HNL following liver resection or transplantation is important to long-term surveillance and management. An accurate histopathologic diagnosis relies on the availability of experienced subspecialty pathologists and remains a costly and labor-intensive process that can lead to delays in diagnosis and care.
Hannah P. Kim, MD, MSCR, is an assistant professor in the division of gastroenterology, hepatology, and nutrition in the department of medicine at Vanderbilt University Medical Center, Nashville, Tenn. She has no conflicts of interest.
As the prevalence of hepatocellular carcinoma (HCC) continues to rise, the early and accurate detection and diagnosis of HCC remains paramount to improving patient outcomes. In cases of typical or advanced HCC, an accurate diagnosis is made using CT or MR imaging. However, hepatocellular nodular lesions (HNLs) with atypical or inconclusive radiographic appearances are often biopsied to achieve a histopathologic diagnosis. In addition, accurate diagnosis of an HNL following liver resection or transplantation is important to long-term surveillance and management. An accurate histopathologic diagnosis relies on the availability of experienced subspecialty pathologists and remains a costly and labor-intensive process that can lead to delays in diagnosis and care.
Hannah P. Kim, MD, MSCR, is an assistant professor in the division of gastroenterology, hepatology, and nutrition in the department of medicine at Vanderbilt University Medical Center, Nashville, Tenn. She has no conflicts of interest.
A new deep learning system can classify hepatocellular nodular lesions (HNLs) via whole-slide images, improving risk stratification of patients and diagnostic rate of hepatocellular carcinoma (HCC), according to investigators.
While the model requires further validation, it could eventually be used to optimize accuracy and efficiency of histologic diagnoses, potentially decreasing reliance on pathologists, particularly in areas with limited access to subspecialists.
In an article published in Gastroenterology, Na Cheng, MD, of Sun Yat-sen University, Guangzhou, China, and colleagues wrote that the “diagnostic process [for HNLs] is laborious, time-consuming, and subject to the experience of the pathologists, often with significant interobserver and intraobserver variability. ... Therefore, [an] automated analysis system is highly demanded in the pathology field, which could considerably ease the workload, speed up the diagnosis, and facilitate the in-time treatment.”
To this end, Dr. Cheng and colleagues developed the hepatocellular-nodular artificial intelligence model (HnAIM) that can scan whole-image slides to identify seven types of tissue: well-differentiated HCC, high-grade dysplastic nodules, low-grade dysplastic nodules, hepatocellular adenoma, focal nodular hyperplasia, and background tissue.
Developing and testing HnAIM was a multistep process that began with three subspecialist pathologists, who independently reviewed and classified liver slides from surgical resection. Unanimous agreement was achieved in 649 slides from 462 patients. These slides were then scanned to create whole-slide images, which were divided into sets for training (70%), validation (15%), and internal testing (15%). Accuracy, measured by area under the curve (AUC), was over 99.9% for the internal testing set. The accuracy of HnAIM was independently, externally validated.
First, HnAIM evaluated liver biopsy slides from 30 patients at one center. Results were compared with diagnoses made by nine pathologists classified as either senior, intermediate, or junior. While HnAIM correctly diagnosed 100% of the cases, senior pathologists correctly diagnosed 94.4% of the cases, followed in accuracy by intermediate (86.7%) and junior (73.3%) pathologists.
The researchers noted that the “rate of agreement with subspecialists was higher for HnAIM than for all 9 pathologists at distinguishing 7 liver tissues, with important diagnostic implications for fragmentary or scarce biopsy specimens.”
Next, HnAIM evaluated 234 samples from three hospitals. Accuracy was slightly lower, with an AUC of 93.5%. The researchers highlighted how HnAIM consistently differentiated precancerous lesions and well-defined HCC from benign lesions and background tissues.
A final experiment showed how HnAIM reacted to the most challenging cases. The investigators selected 12 cases without definitive diagnoses and found that, similar to the findings of three subspecialist pathologists, HnAIM did not reach a single diagnostic conclusion.
The researchers reported that “This may be due to a number of potential reasons, such as inherent uncertainty in the 2-dimensional interpretation of a 3-dimensional specimen, the limited number of tissue samples, and cognitive factors such as anchoring.”
However, HnAIM contributed to the diagnostic process by generating multiple diagnostic possibilities with weighted likelihood. After reviewing these results, the expert pathologists reached consensus in 5 out of 12 cases. Moreover, two out of three expert pathologists agreed on all 12 cases, improving agreement rate from 25% to 100%.
The researchers concluded that the model holds the promise to facilitate human HNL diagnoses and improve efficiency and quality. It can also reduce the workload of pathologists, especially where subspecialists are unavailable.
The study was supported by the National Natural Science Foundation of China, the Guangdong Basic and Applied Basic Research Foundation, the Natural Science Foundation of Guangdong Province, and others. The investigators reported no conflicts of interest.
A new deep learning system can classify hepatocellular nodular lesions (HNLs) via whole-slide images, improving risk stratification of patients and diagnostic rate of hepatocellular carcinoma (HCC), according to investigators.
While the model requires further validation, it could eventually be used to optimize accuracy and efficiency of histologic diagnoses, potentially decreasing reliance on pathologists, particularly in areas with limited access to subspecialists.
In an article published in Gastroenterology, Na Cheng, MD, of Sun Yat-sen University, Guangzhou, China, and colleagues wrote that the “diagnostic process [for HNLs] is laborious, time-consuming, and subject to the experience of the pathologists, often with significant interobserver and intraobserver variability. ... Therefore, [an] automated analysis system is highly demanded in the pathology field, which could considerably ease the workload, speed up the diagnosis, and facilitate the in-time treatment.”
To this end, Dr. Cheng and colleagues developed the hepatocellular-nodular artificial intelligence model (HnAIM) that can scan whole-image slides to identify seven types of tissue: well-differentiated HCC, high-grade dysplastic nodules, low-grade dysplastic nodules, hepatocellular adenoma, focal nodular hyperplasia, and background tissue.
Developing and testing HnAIM was a multistep process that began with three subspecialist pathologists, who independently reviewed and classified liver slides from surgical resection. Unanimous agreement was achieved in 649 slides from 462 patients. These slides were then scanned to create whole-slide images, which were divided into sets for training (70%), validation (15%), and internal testing (15%). Accuracy, measured by area under the curve (AUC), was over 99.9% for the internal testing set. The accuracy of HnAIM was independently, externally validated.
First, HnAIM evaluated liver biopsy slides from 30 patients at one center. Results were compared with diagnoses made by nine pathologists classified as either senior, intermediate, or junior. While HnAIM correctly diagnosed 100% of the cases, senior pathologists correctly diagnosed 94.4% of the cases, followed in accuracy by intermediate (86.7%) and junior (73.3%) pathologists.
The researchers noted that the “rate of agreement with subspecialists was higher for HnAIM than for all 9 pathologists at distinguishing 7 liver tissues, with important diagnostic implications for fragmentary or scarce biopsy specimens.”
Next, HnAIM evaluated 234 samples from three hospitals. Accuracy was slightly lower, with an AUC of 93.5%. The researchers highlighted how HnAIM consistently differentiated precancerous lesions and well-defined HCC from benign lesions and background tissues.
A final experiment showed how HnAIM reacted to the most challenging cases. The investigators selected 12 cases without definitive diagnoses and found that, similar to the findings of three subspecialist pathologists, HnAIM did not reach a single diagnostic conclusion.
The researchers reported that “This may be due to a number of potential reasons, such as inherent uncertainty in the 2-dimensional interpretation of a 3-dimensional specimen, the limited number of tissue samples, and cognitive factors such as anchoring.”
However, HnAIM contributed to the diagnostic process by generating multiple diagnostic possibilities with weighted likelihood. After reviewing these results, the expert pathologists reached consensus in 5 out of 12 cases. Moreover, two out of three expert pathologists agreed on all 12 cases, improving agreement rate from 25% to 100%.
The researchers concluded that the model holds the promise to facilitate human HNL diagnoses and improve efficiency and quality. It can also reduce the workload of pathologists, especially where subspecialists are unavailable.
The study was supported by the National Natural Science Foundation of China, the Guangdong Basic and Applied Basic Research Foundation, the Natural Science Foundation of Guangdong Province, and others. The investigators reported no conflicts of interest.
FROM GASTROENTEROLOGY
New guideline sheds light on diagnosis, treatment of rare GI syndromes
which is comprised of experts representing the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.
Gastrointestinal hamartomatous polyposis syndromes are rare, autosomal dominant disorders associated with intestinal and extraintestinal tumors. Expert consensus statements have previously offered some recommendations for managing these syndromes, but clinical data are scarce, so the present review “is intended to establish a starting point for future research,” lead author C. Richard Boland, MD, of the University of California, San Diego, and colleagues reported.
According to the investigators, “there are essentially no long-term prospective controlled studies of comparative effectiveness of management strategies for these syndromes.” As a result, their recommendations are based on “low-quality” evidence according to GRADE criteria.
Still, Dr. Boland and colleagues highlighted that “there has been tremendous progress in recent years, both in understanding the underlying genetics that underpin these disorders and in elucidating the biology of associated premalignant and malignant conditions.”
The guideline was published online in Gastroenterology .
Four syndromes reviewed
The investigators gathered these data to provide an overview of genetic and clinical features for each syndrome, as well as management strategies. Four disorders are included: juvenile polyposis syndrome; Peutz-Jeghers syndrome; hereditary mixed polyposis syndrome; and PTEN-hamartoma tumor syndrome, encompassing Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome.
Although all gastrointestinal hamartomatous polyposis syndromes are caused by germline alterations, Dr. Boland and colleagues pointed out that diagnoses are typically made based on clinical criteria, with germline results serving as confirmatory evidence.
The guideline recommends that any patient with a family history of hamartomatous polyps, or with a history of at least two hamartomatous polyps, should undergo genetic testing. The guideline also provides more nuanced genetic testing algorithms for each syndrome.
Among all the hamartomatous polyp disorders, Peutz-Jeghers syndrome is most understood, according to the investigators. It is caused by aberrations in the STK11 gene, and is characterized by polyps with “branching bands of smooth muscle covered by hyperplastic glandular mucosa” that may occur in the stomach, small intestine, and colon. Patients are also at risk of extraintestinal neoplasia.
For management of Peutz-Jeghers syndrome, the guideline advises frequent endoscopic surveillance to prevent mechanical obstruction and bleeding, as well as multidisciplinary surveillance of the breasts, pancreas, ovaries, testes, and lungs.
Juvenile polyposis syndrome is most often characterized by solitary, sporadic polyps in the colorectum (98% of patients affected), followed distantly by polyps in the stomach (14%), ileum (7%), jejunum (7%), and duodenum (7%). The condition is linked with abnormalities in BMPR1A or SMAD4 genes, with SMAD4 germline abnormalities more often leading to “massive” gastric polyps, gastrointestinal bleeding, protein-losing enteropathy, and a higher incidence of gastric cancer in adulthood. Most patients with SMAD4 mutations also have hereditary hemorrhagic telangiectasia, characterized by gastrointestinal bleeding from mucocutaneous telangiectasias, arteriovenous malformations, and epistaxis.
Management of juvenile polyposis syndrome depends on frequent colonoscopies with polypectomies beginning at 12-15 years.
“The goal of surveillance in juvenile polyposis syndrome is to mitigate symptoms related to the disorder and decrease the risk of complications from the manifestations, including cancer,” Dr. Boland and colleagues wrote.
PTEN-hamartoma tumor syndrome, which includes both Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome, is caused by abnormalities in the eponymous PTEN gene. Patients with the condition have an increased risk of colon cancer and polyposis, as well as extraintestinal cancers.
Diagnosis of PTEN-hamartoma tumor syndrome may be complex, involving “clinical examination, mammography and breast MRI, thyroid ultrasound, transvaginal ultrasound, upper gastrointestinal endoscopy, colonoscopy, and renal ultrasound,” according to the guideline.
After diagnosis, frequent colonoscopies are recommended, typically starting at age 35 years, as well as continued surveillance of other organs.
Hereditary mixed polyposis syndrome, which involves attenuated colonic polyposis, is the rarest of the four disorders, having been reported in only “a few families,” according to the guideline. The condition has been linked with “large duplications of the promoter region or entire GREM1 gene.”
Onset is typically in the late 20s, “which is when colonoscopic surveillance should begin,” the investigators wrote. More data are needed to determine appropriate surveillance intervals and if the condition is associated with increased risk of extraintestinal neoplasia.
This call for more research into gastrointestinal hamartomatous polyposis syndromes carried through to the conclusion of the guideline.
“Long-term prospective studies of mutation carriers are still needed to further clarify the risk of cancer and the role of surveillance in these syndromes,” Dr. Boland and colleagues wrote. “With increases in genetic testing and evaluation, future studies will be conducted with more robust cohorts of genetically characterized, less heterogeneous populations. However, there is also a need to study patients and families with unusual phenotypes where no genotype can be found.”
The investigators disclosed no conflicts of interest with the current guideline; however, they provided a list of industry relationships, including Salix Pharmaceuticals, Ferring Pharmaceuticals, and Pfizer, among others.
which is comprised of experts representing the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.
Gastrointestinal hamartomatous polyposis syndromes are rare, autosomal dominant disorders associated with intestinal and extraintestinal tumors. Expert consensus statements have previously offered some recommendations for managing these syndromes, but clinical data are scarce, so the present review “is intended to establish a starting point for future research,” lead author C. Richard Boland, MD, of the University of California, San Diego, and colleagues reported.
According to the investigators, “there are essentially no long-term prospective controlled studies of comparative effectiveness of management strategies for these syndromes.” As a result, their recommendations are based on “low-quality” evidence according to GRADE criteria.
Still, Dr. Boland and colleagues highlighted that “there has been tremendous progress in recent years, both in understanding the underlying genetics that underpin these disorders and in elucidating the biology of associated premalignant and malignant conditions.”
The guideline was published online in Gastroenterology .
Four syndromes reviewed
The investigators gathered these data to provide an overview of genetic and clinical features for each syndrome, as well as management strategies. Four disorders are included: juvenile polyposis syndrome; Peutz-Jeghers syndrome; hereditary mixed polyposis syndrome; and PTEN-hamartoma tumor syndrome, encompassing Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome.
Although all gastrointestinal hamartomatous polyposis syndromes are caused by germline alterations, Dr. Boland and colleagues pointed out that diagnoses are typically made based on clinical criteria, with germline results serving as confirmatory evidence.
The guideline recommends that any patient with a family history of hamartomatous polyps, or with a history of at least two hamartomatous polyps, should undergo genetic testing. The guideline also provides more nuanced genetic testing algorithms for each syndrome.
Among all the hamartomatous polyp disorders, Peutz-Jeghers syndrome is most understood, according to the investigators. It is caused by aberrations in the STK11 gene, and is characterized by polyps with “branching bands of smooth muscle covered by hyperplastic glandular mucosa” that may occur in the stomach, small intestine, and colon. Patients are also at risk of extraintestinal neoplasia.
For management of Peutz-Jeghers syndrome, the guideline advises frequent endoscopic surveillance to prevent mechanical obstruction and bleeding, as well as multidisciplinary surveillance of the breasts, pancreas, ovaries, testes, and lungs.
Juvenile polyposis syndrome is most often characterized by solitary, sporadic polyps in the colorectum (98% of patients affected), followed distantly by polyps in the stomach (14%), ileum (7%), jejunum (7%), and duodenum (7%). The condition is linked with abnormalities in BMPR1A or SMAD4 genes, with SMAD4 germline abnormalities more often leading to “massive” gastric polyps, gastrointestinal bleeding, protein-losing enteropathy, and a higher incidence of gastric cancer in adulthood. Most patients with SMAD4 mutations also have hereditary hemorrhagic telangiectasia, characterized by gastrointestinal bleeding from mucocutaneous telangiectasias, arteriovenous malformations, and epistaxis.
Management of juvenile polyposis syndrome depends on frequent colonoscopies with polypectomies beginning at 12-15 years.
“The goal of surveillance in juvenile polyposis syndrome is to mitigate symptoms related to the disorder and decrease the risk of complications from the manifestations, including cancer,” Dr. Boland and colleagues wrote.
PTEN-hamartoma tumor syndrome, which includes both Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome, is caused by abnormalities in the eponymous PTEN gene. Patients with the condition have an increased risk of colon cancer and polyposis, as well as extraintestinal cancers.
Diagnosis of PTEN-hamartoma tumor syndrome may be complex, involving “clinical examination, mammography and breast MRI, thyroid ultrasound, transvaginal ultrasound, upper gastrointestinal endoscopy, colonoscopy, and renal ultrasound,” according to the guideline.
After diagnosis, frequent colonoscopies are recommended, typically starting at age 35 years, as well as continued surveillance of other organs.
Hereditary mixed polyposis syndrome, which involves attenuated colonic polyposis, is the rarest of the four disorders, having been reported in only “a few families,” according to the guideline. The condition has been linked with “large duplications of the promoter region or entire GREM1 gene.”
Onset is typically in the late 20s, “which is when colonoscopic surveillance should begin,” the investigators wrote. More data are needed to determine appropriate surveillance intervals and if the condition is associated with increased risk of extraintestinal neoplasia.
This call for more research into gastrointestinal hamartomatous polyposis syndromes carried through to the conclusion of the guideline.
“Long-term prospective studies of mutation carriers are still needed to further clarify the risk of cancer and the role of surveillance in these syndromes,” Dr. Boland and colleagues wrote. “With increases in genetic testing and evaluation, future studies will be conducted with more robust cohorts of genetically characterized, less heterogeneous populations. However, there is also a need to study patients and families with unusual phenotypes where no genotype can be found.”
The investigators disclosed no conflicts of interest with the current guideline; however, they provided a list of industry relationships, including Salix Pharmaceuticals, Ferring Pharmaceuticals, and Pfizer, among others.
which is comprised of experts representing the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.
Gastrointestinal hamartomatous polyposis syndromes are rare, autosomal dominant disorders associated with intestinal and extraintestinal tumors. Expert consensus statements have previously offered some recommendations for managing these syndromes, but clinical data are scarce, so the present review “is intended to establish a starting point for future research,” lead author C. Richard Boland, MD, of the University of California, San Diego, and colleagues reported.
According to the investigators, “there are essentially no long-term prospective controlled studies of comparative effectiveness of management strategies for these syndromes.” As a result, their recommendations are based on “low-quality” evidence according to GRADE criteria.
Still, Dr. Boland and colleagues highlighted that “there has been tremendous progress in recent years, both in understanding the underlying genetics that underpin these disorders and in elucidating the biology of associated premalignant and malignant conditions.”
The guideline was published online in Gastroenterology .
Four syndromes reviewed
The investigators gathered these data to provide an overview of genetic and clinical features for each syndrome, as well as management strategies. Four disorders are included: juvenile polyposis syndrome; Peutz-Jeghers syndrome; hereditary mixed polyposis syndrome; and PTEN-hamartoma tumor syndrome, encompassing Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome.
Although all gastrointestinal hamartomatous polyposis syndromes are caused by germline alterations, Dr. Boland and colleagues pointed out that diagnoses are typically made based on clinical criteria, with germline results serving as confirmatory evidence.
The guideline recommends that any patient with a family history of hamartomatous polyps, or with a history of at least two hamartomatous polyps, should undergo genetic testing. The guideline also provides more nuanced genetic testing algorithms for each syndrome.
Among all the hamartomatous polyp disorders, Peutz-Jeghers syndrome is most understood, according to the investigators. It is caused by aberrations in the STK11 gene, and is characterized by polyps with “branching bands of smooth muscle covered by hyperplastic glandular mucosa” that may occur in the stomach, small intestine, and colon. Patients are also at risk of extraintestinal neoplasia.
For management of Peutz-Jeghers syndrome, the guideline advises frequent endoscopic surveillance to prevent mechanical obstruction and bleeding, as well as multidisciplinary surveillance of the breasts, pancreas, ovaries, testes, and lungs.
Juvenile polyposis syndrome is most often characterized by solitary, sporadic polyps in the colorectum (98% of patients affected), followed distantly by polyps in the stomach (14%), ileum (7%), jejunum (7%), and duodenum (7%). The condition is linked with abnormalities in BMPR1A or SMAD4 genes, with SMAD4 germline abnormalities more often leading to “massive” gastric polyps, gastrointestinal bleeding, protein-losing enteropathy, and a higher incidence of gastric cancer in adulthood. Most patients with SMAD4 mutations also have hereditary hemorrhagic telangiectasia, characterized by gastrointestinal bleeding from mucocutaneous telangiectasias, arteriovenous malformations, and epistaxis.
Management of juvenile polyposis syndrome depends on frequent colonoscopies with polypectomies beginning at 12-15 years.
“The goal of surveillance in juvenile polyposis syndrome is to mitigate symptoms related to the disorder and decrease the risk of complications from the manifestations, including cancer,” Dr. Boland and colleagues wrote.
PTEN-hamartoma tumor syndrome, which includes both Bannayan-Riley-Ruvalcaba syndrome and Cowden’s syndrome, is caused by abnormalities in the eponymous PTEN gene. Patients with the condition have an increased risk of colon cancer and polyposis, as well as extraintestinal cancers.
Diagnosis of PTEN-hamartoma tumor syndrome may be complex, involving “clinical examination, mammography and breast MRI, thyroid ultrasound, transvaginal ultrasound, upper gastrointestinal endoscopy, colonoscopy, and renal ultrasound,” according to the guideline.
After diagnosis, frequent colonoscopies are recommended, typically starting at age 35 years, as well as continued surveillance of other organs.
Hereditary mixed polyposis syndrome, which involves attenuated colonic polyposis, is the rarest of the four disorders, having been reported in only “a few families,” according to the guideline. The condition has been linked with “large duplications of the promoter region or entire GREM1 gene.”
Onset is typically in the late 20s, “which is when colonoscopic surveillance should begin,” the investigators wrote. More data are needed to determine appropriate surveillance intervals and if the condition is associated with increased risk of extraintestinal neoplasia.
This call for more research into gastrointestinal hamartomatous polyposis syndromes carried through to the conclusion of the guideline.
“Long-term prospective studies of mutation carriers are still needed to further clarify the risk of cancer and the role of surveillance in these syndromes,” Dr. Boland and colleagues wrote. “With increases in genetic testing and evaluation, future studies will be conducted with more robust cohorts of genetically characterized, less heterogeneous populations. However, there is also a need to study patients and families with unusual phenotypes where no genotype can be found.”
The investigators disclosed no conflicts of interest with the current guideline; however, they provided a list of industry relationships, including Salix Pharmaceuticals, Ferring Pharmaceuticals, and Pfizer, among others.
FROM GASTROENTEROLOGY