CHEST

Chest Infections and Disaster Response Network

Chest Infections Section

Ventilator-associated pneumonia (VAP) is a common cause of hospital-related morbidity in critically ill patients. The efficacy of prophylactic antibiotics in the prevention of VAP has been the subject of several studies in recent years. Three large randomized controlled trials, all published since late 2022, have investigated whether antibiotics can prevent VAP and the optimal method of antibiotic administration.

In the AMIKINHAL trial, patients intubated for at least 72 hours in 19 ICUs in France received inhaled amikacin at a dose of 20 mg/kg/day for 3 days.¹ Compared with placebo, there was a statistically significant, 7% absolute risk reduction in rate of VAP at 28 days.

In the SUDDICU trial, patients suspected to be intubated for at least 48 hours in 19 ICUs in Australia received a combination of oral paste and gastric suspension containing colistin, tobramycin, and nystatin every 6 hours along with 4 days of intravenous antibiotics.² There was no difference in the primary outcome of 90-day all-cause mortality; however, there was a statistically significant, 12% reduction in the isolation of antibiotic-resistant organisms in cultures.

In the PROPHY-VAP trial, patients with acute brain injury (Glasgow Coma Scale score [GCS ] ≤12) intubated for at least 48 hours in 9 ICUs in France received a single dose of intravenous ceftriaxone (2 g) within 12 hours of intubation.³ There was an 18% absolute risk reduction in VAP from days 2 to 7 post-ventilation.

These trials, involving distinct patient populations and interventions, indicate that antibiotic prophylaxis may reduce VAP risk under specific circumstances, but its effect on overall outcomes is still uncertain. The understanding of prophylactic antibiotics in VAP prevention is rapidly evolving.

References

1. Ehrmann S, et al. N Engl J Med. 2023;389(22):2052-2062.

2. Myburgh JA, et al. JAMA. 2022;328(19):1911-1921.

3. Dahyot-Fizelier C, et al. Lancet Respir Med. 2024;S2213-2600(23):00471-X.

CHEST

Chest Infections and Disaster Response Network

Chest Infections Section

Ventilator-associated pneumonia (VAP) is a common cause of hospital-related morbidity in critically ill patients. The efficacy of prophylactic antibiotics in the prevention of VAP has been the subject of several studies in recent years. Three large randomized controlled trials, all published since late 2022, have investigated whether antibiotics can prevent VAP and the optimal method of antibiotic administration.

In the AMIKINHAL trial, patients intubated for at least 72 hours in 19 ICUs in France received inhaled amikacin at a dose of 20 mg/kg/day for 3 days.¹ Compared with placebo, there was a statistically significant, 7% absolute risk reduction in rate of VAP at 28 days.

In the SUDDICU trial, patients suspected to be intubated for at least 48 hours in 19 ICUs in Australia received a combination of oral paste and gastric suspension containing colistin, tobramycin, and nystatin every 6 hours along with 4 days of intravenous antibiotics.² There was no difference in the primary outcome of 90-day all-cause mortality; however, there was a statistically significant, 12% reduction in the isolation of antibiotic-resistant organisms in cultures.

In the PROPHY-VAP trial, patients with acute brain injury (Glasgow Coma Scale score [GCS ] ≤12) intubated for at least 48 hours in 9 ICUs in France received a single dose of intravenous ceftriaxone (2 g) within 12 hours of intubation.³ There was an 18% absolute risk reduction in VAP from days 2 to 7 post-ventilation.

These trials, involving distinct patient populations and interventions, indicate that antibiotic prophylaxis may reduce VAP risk under specific circumstances, but its effect on overall outcomes is still uncertain. The understanding of prophylactic antibiotics in VAP prevention is rapidly evolving.

References

1. Ehrmann S, et al. N Engl J Med. 2023;389(22):2052-2062.

2. Myburgh JA, et al. JAMA. 2022;328(19):1911-1921.

3. Dahyot-Fizelier C, et al. Lancet Respir Med. 2024;S2213-2600(23):00471-X.

CHEST

Chest Infections and Disaster Response Network

Chest Infections Section

Ventilator-associated pneumonia (VAP) is a common cause of hospital-related morbidity in critically ill patients. The efficacy of prophylactic antibiotics in the prevention of VAP has been the subject of several studies in recent years. Three large randomized controlled trials, all published since late 2022, have investigated whether antibiotics can prevent VAP and the optimal method of antibiotic administration.

In the AMIKINHAL trial, patients intubated for at least 72 hours in 19 ICUs in France received inhaled amikacin at a dose of 20 mg/kg/day for 3 days.¹ Compared with placebo, there was a statistically significant, 7% absolute risk reduction in rate of VAP at 28 days.

In the SUDDICU trial, patients suspected to be intubated for at least 48 hours in 19 ICUs in Australia received a combination of oral paste and gastric suspension containing colistin, tobramycin, and nystatin every 6 hours along with 4 days of intravenous antibiotics.² There was no difference in the primary outcome of 90-day all-cause mortality; however, there was a statistically significant, 12% reduction in the isolation of antibiotic-resistant organisms in cultures.

In the PROPHY-VAP trial, patients with acute brain injury (Glasgow Coma Scale score [GCS ] ≤12) intubated for at least 48 hours in 9 ICUs in France received a single dose of intravenous ceftriaxone (2 g) within 12 hours of intubation.³ There was an 18% absolute risk reduction in VAP from days 2 to 7 post-ventilation.

These trials, involving distinct patient populations and interventions, indicate that antibiotic prophylaxis may reduce VAP risk under specific circumstances, but its effect on overall outcomes is still uncertain. The understanding of prophylactic antibiotics in VAP prevention is rapidly evolving.

References

1. Ehrmann S, et al. N Engl J Med. 2023;389(22):2052-2062.

2. Myburgh JA, et al. JAMA. 2022;328(19):1911-1921.

3. Dahyot-Fizelier C, et al. Lancet Respir Med. 2024;S2213-2600(23):00471-X.

In 2022, more than 78,000 new cases of tuberculosis (TB) were reported in Brazil, with an incidence of 36.3 cases per 100,000 inhabitants. According to researchers from the Regional Prospective Observational Research for Tuberculosis (RePORT)-Brazil consortium, the country could improve the control of this infection if all patients were subjected to a sensitivity test capable of early detection of resistance not only to rifampicin, but also to isoniazid, before starting treatment. A study by the consortium published this year in Open Forum Infectious Diseases found that monoresistance to isoniazid predicted unfavorable outcomes at the national level.

Isoniazid is part of the first-choice therapeutic regimen for patients with pulmonary TB. The regimen also includes rifampicin, pyrazinamide, and ethambutol. According to Bruno Andrade, MD, PhD, Afrânio Kritski, MD, PhD, and biotechnologist Mariana Araújo Pereira, PhD, researchers from RePORT International and RePORT-Brazil, this regimen is used during the intensive phase of treatment, which usually lasts for 2 months. It is followed by a maintenance phase of another 4 months, during which isoniazid and rifampicin continue to be administered. When monoresistance to isoniazid is detected, however, the recommendation is to use a regimen containing a quinolone instead of isoniazid.

Suboptimal Sensitivity Testing 

Since 2015, Brazil’s Ministry of Health has recommended sensitivity testing for all suspected TB cases. In practice, however, this approach is not carried out in the ideal manner. The three researchers told the Medscape Portuguese edition that, according to data from the National Notifiable Diseases Information System (Sinan) of the Ministry of Health, culture testing is conducted in about 30% of cases. Sensitivity testing to identify resistance to first-line drugs (rifampicin, isoniazid, ethambutol, and pyrazinamide) and second-line drugs (quinolone and amikacin) is performed in only 12% of cases.

The initiative of the RePORT-Brazil group analyzed 21,197 TB cases registered in Sinan between June 2015 and June 2019 and identified a rate of monoresistance to isoniazid of 1.4%.

For the researchers, the problem of monoresistance to isoniazid in Brazil is still underestimated. This underestimation results from the infrequent performance of culture and sensitivity testing to detect resistance to first- and second-line drugs and because the XPERT MTB RIF test, which detects only rifampicin resistance, is still used.

Resistance and Worse Outcomes

The study also showed that the frequency of unfavorable outcomes in antituberculosis treatment (death or therapeutic failure) was significantly higher among patients with monoresistance to isoniazid (9.1% vs 3.05%).

The finding serves as a warning about the importance of increasing the administration of sensitivity tests to detect resistance to drugs used in tuberculosis treatment, including isoniazid.

Testing sensitivity to rifampicin and isoniazid before starting treatment could transform tuberculosis control in Brazil, allowing for more targeted and effective treatments from the outset, said the researchers. “This not only increases the chances of successful individual treatment but also helps prevent the transmission of resistant strains and develop a more accurate understanding of drug resistance trends,” they emphasized.

They pointed out, however, that implementing this testing in the Unified Health System depends on improvements in resource allocation, coordination between the national TB program and state and municipal programs, and improvements in infrastructure and the technical staff of the Central Public Health Laboratories.

“Although the initial cost is considerable, these investments can be offset by long-term savings resulting from the reduction in the use of more expensive and prolonged treatments for resistant tuberculosis,” said the researchers.

This story was translated from the Medscape Portuguese edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.

A version of this article appeared on Medscape.com.

In 2022, more than 78,000 new cases of tuberculosis (TB) were reported in Brazil, with an incidence of 36.3 cases per 100,000 inhabitants. According to researchers from the Regional Prospective Observational Research for Tuberculosis (RePORT)-Brazil consortium, the country could improve the control of this infection if all patients were subjected to a sensitivity test capable of early detection of resistance not only to rifampicin, but also to isoniazid, before starting treatment. A study by the consortium published this year in Open Forum Infectious Diseases found that monoresistance to isoniazid predicted unfavorable outcomes at the national level.

Isoniazid is part of the first-choice therapeutic regimen for patients with pulmonary TB. The regimen also includes rifampicin, pyrazinamide, and ethambutol. According to Bruno Andrade, MD, PhD, Afrânio Kritski, MD, PhD, and biotechnologist Mariana Araújo Pereira, PhD, researchers from RePORT International and RePORT-Brazil, this regimen is used during the intensive phase of treatment, which usually lasts for 2 months. It is followed by a maintenance phase of another 4 months, during which isoniazid and rifampicin continue to be administered. When monoresistance to isoniazid is detected, however, the recommendation is to use a regimen containing a quinolone instead of isoniazid.

Suboptimal Sensitivity Testing 

Since 2015, Brazil’s Ministry of Health has recommended sensitivity testing for all suspected TB cases. In practice, however, this approach is not carried out in the ideal manner. The three researchers told the Medscape Portuguese edition that, according to data from the National Notifiable Diseases Information System (Sinan) of the Ministry of Health, culture testing is conducted in about 30% of cases. Sensitivity testing to identify resistance to first-line drugs (rifampicin, isoniazid, ethambutol, and pyrazinamide) and second-line drugs (quinolone and amikacin) is performed in only 12% of cases.

The initiative of the RePORT-Brazil group analyzed 21,197 TB cases registered in Sinan between June 2015 and June 2019 and identified a rate of monoresistance to isoniazid of 1.4%.

For the researchers, the problem of monoresistance to isoniazid in Brazil is still underestimated. This underestimation results from the infrequent performance of culture and sensitivity testing to detect resistance to first- and second-line drugs and because the XPERT MTB RIF test, which detects only rifampicin resistance, is still used.

Resistance and Worse Outcomes

The study also showed that the frequency of unfavorable outcomes in antituberculosis treatment (death or therapeutic failure) was significantly higher among patients with monoresistance to isoniazid (9.1% vs 3.05%).

The finding serves as a warning about the importance of increasing the administration of sensitivity tests to detect resistance to drugs used in tuberculosis treatment, including isoniazid.

Testing sensitivity to rifampicin and isoniazid before starting treatment could transform tuberculosis control in Brazil, allowing for more targeted and effective treatments from the outset, said the researchers. “This not only increases the chances of successful individual treatment but also helps prevent the transmission of resistant strains and develop a more accurate understanding of drug resistance trends,” they emphasized.

They pointed out, however, that implementing this testing in the Unified Health System depends on improvements in resource allocation, coordination between the national TB program and state and municipal programs, and improvements in infrastructure and the technical staff of the Central Public Health Laboratories.

“Although the initial cost is considerable, these investments can be offset by long-term savings resulting from the reduction in the use of more expensive and prolonged treatments for resistant tuberculosis,” said the researchers.

This story was translated from the Medscape Portuguese edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.

A version of this article appeared on Medscape.com.

In 2022, more than 78,000 new cases of tuberculosis (TB) were reported in Brazil, with an incidence of 36.3 cases per 100,000 inhabitants. According to researchers from the Regional Prospective Observational Research for Tuberculosis (RePORT)-Brazil consortium, the country could improve the control of this infection if all patients were subjected to a sensitivity test capable of early detection of resistance not only to rifampicin, but also to isoniazid, before starting treatment. A study by the consortium published this year in Open Forum Infectious Diseases found that monoresistance to isoniazid predicted unfavorable outcomes at the national level.

Isoniazid is part of the first-choice therapeutic regimen for patients with pulmonary TB. The regimen also includes rifampicin, pyrazinamide, and ethambutol. According to Bruno Andrade, MD, PhD, Afrânio Kritski, MD, PhD, and biotechnologist Mariana Araújo Pereira, PhD, researchers from RePORT International and RePORT-Brazil, this regimen is used during the intensive phase of treatment, which usually lasts for 2 months. It is followed by a maintenance phase of another 4 months, during which isoniazid and rifampicin continue to be administered. When monoresistance to isoniazid is detected, however, the recommendation is to use a regimen containing a quinolone instead of isoniazid.

Suboptimal Sensitivity Testing 

Since 2015, Brazil’s Ministry of Health has recommended sensitivity testing for all suspected TB cases. In practice, however, this approach is not carried out in the ideal manner. The three researchers told the Medscape Portuguese edition that, according to data from the National Notifiable Diseases Information System (Sinan) of the Ministry of Health, culture testing is conducted in about 30% of cases. Sensitivity testing to identify resistance to first-line drugs (rifampicin, isoniazid, ethambutol, and pyrazinamide) and second-line drugs (quinolone and amikacin) is performed in only 12% of cases.

The initiative of the RePORT-Brazil group analyzed 21,197 TB cases registered in Sinan between June 2015 and June 2019 and identified a rate of monoresistance to isoniazid of 1.4%.

For the researchers, the problem of monoresistance to isoniazid in Brazil is still underestimated. This underestimation results from the infrequent performance of culture and sensitivity testing to detect resistance to first- and second-line drugs and because the XPERT MTB RIF test, which detects only rifampicin resistance, is still used.

Resistance and Worse Outcomes

The study also showed that the frequency of unfavorable outcomes in antituberculosis treatment (death or therapeutic failure) was significantly higher among patients with monoresistance to isoniazid (9.1% vs 3.05%).

The finding serves as a warning about the importance of increasing the administration of sensitivity tests to detect resistance to drugs used in tuberculosis treatment, including isoniazid.

Testing sensitivity to rifampicin and isoniazid before starting treatment could transform tuberculosis control in Brazil, allowing for more targeted and effective treatments from the outset, said the researchers. “This not only increases the chances of successful individual treatment but also helps prevent the transmission of resistant strains and develop a more accurate understanding of drug resistance trends,” they emphasized.

They pointed out, however, that implementing this testing in the Unified Health System depends on improvements in resource allocation, coordination between the national TB program and state and municipal programs, and improvements in infrastructure and the technical staff of the Central Public Health Laboratories.

“Although the initial cost is considerable, these investments can be offset by long-term savings resulting from the reduction in the use of more expensive and prolonged treatments for resistant tuberculosis,” said the researchers.

This story was translated from the Medscape Portuguese edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.

A version of this article appeared on Medscape.com.

When her obstetrician-gynecologist recommended a mammogram, Emily Legg didn’t hesitate to schedule an appointment for the screening.

Her grandmother had been diagnosed with breast cancer and her father died of prostate cancer in his mid-50s. Ms. Legg also has polycystic ovary syndrome (PCOS), which increases the risk of some cancers.

Having just turned 40, Ms. Legg said she was determined to be as proactive as possible with cancer screenings.

Before the mammogram, she arranged for childcare for her 6-month-old daughter and filled out a required questionnaire online that asked about her history and health conditions. When the appointment day arrived, Ms. Legg made the 30-minute drive to the clinic where she was prepped for the procedure and escorted to the mammography room.

But just before the screening started, Ms. Legg happened to mention to the technician that she was breastfeeding. The surprised tech immediately halted the procedure, Ms. Legg said. Because of increased breast density caused by nursing, Ms. Legg was told to wait at least 6 weeks after weaning for a mammogram.

“I didn’t even consider that breastfeeding might prevent me from getting a mammogram,” said Ms. Legg, a writing professor from Hamilton, Ohio. “I had to go home. I was frustrated, mostly because I had driven all that way. I had hyped myself up. I had childcare in line. And now I had to wait until my daughter weaned? At the time, I didn’t know if my daughter was going to breastfeed for 2 years or be done at 6 months.”

Considering her family background, Ms. Legg worried about not receiving the screening. Her sister had recently undergone a mammogram while she was breastfeeding without any problems.

When she did research, Ms. Legg found conflicting information about the subject online so she turned to Reddit, where she started a thread asking if other moms over 40 had experienced similar issues. Dozens of moms responded with questions and concerns on the subject. Some wrote about being denied a mammogram while breastfeeding, while others wrote they received the procedure without question. Guidance from health professionals on the topic appeared to vastly differ.

“That’s why I turned to [social media] because I wasn’t finding anything else,” Ms. Legg said. “There’s just a lack of clear information. As an older mom, there’s less information out there for being postpartum and being over 40.”

Confusion over screenings during breastfeeding comes at the intersection of national guidelines lowering the recommended age for first mammograms, more women having babies later in life, and women getting breast cancer earlier.

Legg family

Most physician specialty associations agree that mammography is safe for breastfeeding patients and that they need not delay routine screenings. However, the safety of breast imaging during pregnancy and lactation is not well advertised, said Molly Peterson, MD, a radiologist based in St. Frances, Wisconsin, and lead author of a 2023 article about breast imaging during pregnancy and lactation in RadioGraphics, a journal of the Radiological Society of North America.

Conflicting information from nonscientific resources adds to the confusion, Dr. Peterson said. At the same time, health providers along the care spectrum may be uncertain about what imaging is safe and reasonable. Recommendations about mammography and lactation can also vary by institution, screening experts say.

“I’ve talked with pregnant and breastfeeding patients, both younger and older, who were unsure if they could have mammograms,” Dr. Peterson said. “I’ve also fielded questions from technologists, unclear what imaging we can offer these patients. ... Educating health professionals about evidence-based guidelines for screening and diagnostic imaging and reassuring patients about the safety of breast imaging during pregnancy and lactation is thus more important than ever.”
 

Differing Guidelines, Case-by-Case Considerations

The RadioGraphics paper emphasizes that both screening and diagnostic imaging can be safely performed using protocols based on age, breast cancer risk, and whether the patient is pregnant or lactating.

The American College of Radiology (ACR) Appropriateness Criteria also support mammography for certain patients during lactation. The guidelines state there is no contraindication to performing mammography during lactation, but note that challenges in evaluation can arise because of the unique physiological and structural breast changes that can occur.

“Hormones can change breast density and size of the breast, which could limit the clinical examination, mimic pathology, and obscure mammographic findings,” said Stamatia V. Destounis, MD, FACR, chair of the ACR Breast Imaging Commission. “It is important the patient pumps right before the mammogram or brings the baby to breastfeed prior to the imaging examination to offer the best imaging evaluation and reduce breast density as much as possible.”

In those patients who choose to prolong breastfeeding and are of the age to be screened, it is important they undergo yearly clinical breast exams, perform breast self-exams, and discuss breast cancer screening with their healthcare provider, she said. “They should not delay a routine screening mammogram. Most patients have dense breast tissue at this time, and frequently a breast ultrasound may be performed also.”

The American College of Obstetricians and Gynecologists (ACOG) does not have specific guidelines about breastfeeding mothers and mammography recommendations. Breastfeeding patients should discuss with their physicians or midwives the pros and cons of mammography, taking into account personal risk factors and how long they plan to nurse, said Joshua Copel, MD, vice chair of obstetrics, gynecology and reproductive sciences at Yale Medicine, New Haven, Connecticut, and a member of ACOG’s Committee on Obstetric Practice.

“The question for anybody to address with their physician will be, ‘Is my risk of breast cancer high enough that I should take that small risk that they’re going to over- or underread the mammogram because of my nursing status? Or should I wait until I wean the baby and have the mammogram then?’” he said.

Institutional and practice protocols meanwhile, can depend on a patient’s cancer risk.

Guidelines at the University of Wisconsin, for instance, advise that lactating patients 40 or over who are at average risk, wait 6-8 weeks after cessation of breastfeeding, said Alison Gegios, MD, a radiologist and assistant professor in breast imaging at the University of Wisconsin School of Medicine and Public Health. Average risk is defined as less than a 15% lifetime risk of breast cancer, she said.

Dr. Gegios, a coauthor on the RadioGraphics paper, said her institution recommends screening mammography if lactating patients are at intermediate or high risk, and are over 30. In such cases however, screening is generally deferred until 3-6 months after delivery, she noted.

“If patients are high risk, it’s also important to do screening breast MRIs,” Dr. Gegios said. “Studies have shown that screening breast MRIs are effective in breastfeeding patients despite their increased background parenchymal enhancement because breast cancer still stands out on our maximum intensity projections and stands out on the exam from the background.”
 

How to Clear Up Confusion, Promote Consistency

After her experience at the mammography practice, Ms. Legg went home and immediately sent a message to her ob.gyn. about what happened.

The doctor was similarly surprised and frustrated that Ms. Legg wasn’t able to get the mammogram, she said. To get around the difference in protocols, Ms. Legg’s ob.gyn. referred her to a high-risk clinic in Cincinnati. Ms. Legg’s history qualified her as high risk and she received genetic testing and a breast ultrasound at the clinic, she said.

“The ultrasound showed some shady spots,” Ms. Legg recalled. “They weren’t quite sure what they were. Another ultrasound later, they determined the spots were symmetrical and it ended up not being anything [serious]. Genetic-wise, I did not have any markers for cancer.”

Ms. Legg was relieved and she eventually received a mammogram when she finished breastfeeding, she said. However, she feels the overlap of older, breastfeeding moms and mammography guidelines deserves more attention.

“I would encourage all of us in the ‘geriatric mother’s club,’ to advocate for yourself, do your research, and also turn to your medical professionals and ask questions,” she said. “Make sure you know what they recommend for moms who are older and just had a baby.”

On the provider side, Dr. Destounis said physicians should revisit with patients the most updated guidelines about breastfeeding and mammography at routine appointments.

“Patients and their physicians have to have communication about screening for breast cancer if they are of screening age,” she said.

Dr. Copel advises physicians to run through the risks and benefits of mammograms with older, breastfeeding patients and make a shared decision. “It’s all going to vary with the individual circumstances,” he said. “If someone [has] a BRCA gene and their sister and mother had breast cancer, maybe it’s worth it. If somebody has absolutely no family history and just crossed the threshold for meeting a mammogram [recommendation], then sure, wait.”

Ms. Legg would like to see more professional literature and educational material directed toward the older, breastfeeding population about mammograms.

“At minimum, work together across departments to create an intake form, a questionnaire that is inclusive of everything,” she said. “There should be a question before you even get to the tech that asks, ‘Are you breastfeeding?’ ”

When her obstetrician-gynecologist recommended a mammogram, Emily Legg didn’t hesitate to schedule an appointment for the screening.

Her grandmother had been diagnosed with breast cancer and her father died of prostate cancer in his mid-50s. Ms. Legg also has polycystic ovary syndrome (PCOS), which increases the risk of some cancers.

Having just turned 40, Ms. Legg said she was determined to be as proactive as possible with cancer screenings.

Before the mammogram, she arranged for childcare for her 6-month-old daughter and filled out a required questionnaire online that asked about her history and health conditions. When the appointment day arrived, Ms. Legg made the 30-minute drive to the clinic where she was prepped for the procedure and escorted to the mammography room.

But just before the screening started, Ms. Legg happened to mention to the technician that she was breastfeeding. The surprised tech immediately halted the procedure, Ms. Legg said. Because of increased breast density caused by nursing, Ms. Legg was told to wait at least 6 weeks after weaning for a mammogram.

“I didn’t even consider that breastfeeding might prevent me from getting a mammogram,” said Ms. Legg, a writing professor from Hamilton, Ohio. “I had to go home. I was frustrated, mostly because I had driven all that way. I had hyped myself up. I had childcare in line. And now I had to wait until my daughter weaned? At the time, I didn’t know if my daughter was going to breastfeed for 2 years or be done at 6 months.”

Considering her family background, Ms. Legg worried about not receiving the screening. Her sister had recently undergone a mammogram while she was breastfeeding without any problems.

When she did research, Ms. Legg found conflicting information about the subject online so she turned to Reddit, where she started a thread asking if other moms over 40 had experienced similar issues. Dozens of moms responded with questions and concerns on the subject. Some wrote about being denied a mammogram while breastfeeding, while others wrote they received the procedure without question. Guidance from health professionals on the topic appeared to vastly differ.

“That’s why I turned to [social media] because I wasn’t finding anything else,” Ms. Legg said. “There’s just a lack of clear information. As an older mom, there’s less information out there for being postpartum and being over 40.”

Confusion over screenings during breastfeeding comes at the intersection of national guidelines lowering the recommended age for first mammograms, more women having babies later in life, and women getting breast cancer earlier.

Legg family

Most physician specialty associations agree that mammography is safe for breastfeeding patients and that they need not delay routine screenings. However, the safety of breast imaging during pregnancy and lactation is not well advertised, said Molly Peterson, MD, a radiologist based in St. Frances, Wisconsin, and lead author of a 2023 article about breast imaging during pregnancy and lactation in RadioGraphics, a journal of the Radiological Society of North America.

Conflicting information from nonscientific resources adds to the confusion, Dr. Peterson said. At the same time, health providers along the care spectrum may be uncertain about what imaging is safe and reasonable. Recommendations about mammography and lactation can also vary by institution, screening experts say.

“I’ve talked with pregnant and breastfeeding patients, both younger and older, who were unsure if they could have mammograms,” Dr. Peterson said. “I’ve also fielded questions from technologists, unclear what imaging we can offer these patients. ... Educating health professionals about evidence-based guidelines for screening and diagnostic imaging and reassuring patients about the safety of breast imaging during pregnancy and lactation is thus more important than ever.”
 

Differing Guidelines, Case-by-Case Considerations

The RadioGraphics paper emphasizes that both screening and diagnostic imaging can be safely performed using protocols based on age, breast cancer risk, and whether the patient is pregnant or lactating.

The American College of Radiology (ACR) Appropriateness Criteria also support mammography for certain patients during lactation. The guidelines state there is no contraindication to performing mammography during lactation, but note that challenges in evaluation can arise because of the unique physiological and structural breast changes that can occur.

“Hormones can change breast density and size of the breast, which could limit the clinical examination, mimic pathology, and obscure mammographic findings,” said Stamatia V. Destounis, MD, FACR, chair of the ACR Breast Imaging Commission. “It is important the patient pumps right before the mammogram or brings the baby to breastfeed prior to the imaging examination to offer the best imaging evaluation and reduce breast density as much as possible.”

In those patients who choose to prolong breastfeeding and are of the age to be screened, it is important they undergo yearly clinical breast exams, perform breast self-exams, and discuss breast cancer screening with their healthcare provider, she said. “They should not delay a routine screening mammogram. Most patients have dense breast tissue at this time, and frequently a breast ultrasound may be performed also.”

The American College of Obstetricians and Gynecologists (ACOG) does not have specific guidelines about breastfeeding mothers and mammography recommendations. Breastfeeding patients should discuss with their physicians or midwives the pros and cons of mammography, taking into account personal risk factors and how long they plan to nurse, said Joshua Copel, MD, vice chair of obstetrics, gynecology and reproductive sciences at Yale Medicine, New Haven, Connecticut, and a member of ACOG’s Committee on Obstetric Practice.

“The question for anybody to address with their physician will be, ‘Is my risk of breast cancer high enough that I should take that small risk that they’re going to over- or underread the mammogram because of my nursing status? Or should I wait until I wean the baby and have the mammogram then?’” he said.

Institutional and practice protocols meanwhile, can depend on a patient’s cancer risk.

Guidelines at the University of Wisconsin, for instance, advise that lactating patients 40 or over who are at average risk, wait 6-8 weeks after cessation of breastfeeding, said Alison Gegios, MD, a radiologist and assistant professor in breast imaging at the University of Wisconsin School of Medicine and Public Health. Average risk is defined as less than a 15% lifetime risk of breast cancer, she said.

Dr. Gegios, a coauthor on the RadioGraphics paper, said her institution recommends screening mammography if lactating patients are at intermediate or high risk, and are over 30. In such cases however, screening is generally deferred until 3-6 months after delivery, she noted.

“If patients are high risk, it’s also important to do screening breast MRIs,” Dr. Gegios said. “Studies have shown that screening breast MRIs are effective in breastfeeding patients despite their increased background parenchymal enhancement because breast cancer still stands out on our maximum intensity projections and stands out on the exam from the background.”
 

How to Clear Up Confusion, Promote Consistency

After her experience at the mammography practice, Ms. Legg went home and immediately sent a message to her ob.gyn. about what happened.

The doctor was similarly surprised and frustrated that Ms. Legg wasn’t able to get the mammogram, she said. To get around the difference in protocols, Ms. Legg’s ob.gyn. referred her to a high-risk clinic in Cincinnati. Ms. Legg’s history qualified her as high risk and she received genetic testing and a breast ultrasound at the clinic, she said.

“The ultrasound showed some shady spots,” Ms. Legg recalled. “They weren’t quite sure what they were. Another ultrasound later, they determined the spots were symmetrical and it ended up not being anything [serious]. Genetic-wise, I did not have any markers for cancer.”

Ms. Legg was relieved and she eventually received a mammogram when she finished breastfeeding, she said. However, she feels the overlap of older, breastfeeding moms and mammography guidelines deserves more attention.

“I would encourage all of us in the ‘geriatric mother’s club,’ to advocate for yourself, do your research, and also turn to your medical professionals and ask questions,” she said. “Make sure you know what they recommend for moms who are older and just had a baby.”

On the provider side, Dr. Destounis said physicians should revisit with patients the most updated guidelines about breastfeeding and mammography at routine appointments.

“Patients and their physicians have to have communication about screening for breast cancer if they are of screening age,” she said.

Dr. Copel advises physicians to run through the risks and benefits of mammograms with older, breastfeeding patients and make a shared decision. “It’s all going to vary with the individual circumstances,” he said. “If someone [has] a BRCA gene and their sister and mother had breast cancer, maybe it’s worth it. If somebody has absolutely no family history and just crossed the threshold for meeting a mammogram [recommendation], then sure, wait.”

Ms. Legg would like to see more professional literature and educational material directed toward the older, breastfeeding population about mammograms.

“At minimum, work together across departments to create an intake form, a questionnaire that is inclusive of everything,” she said. “There should be a question before you even get to the tech that asks, ‘Are you breastfeeding?’ ”

When her obstetrician-gynecologist recommended a mammogram, Emily Legg didn’t hesitate to schedule an appointment for the screening.

Her grandmother had been diagnosed with breast cancer and her father died of prostate cancer in his mid-50s. Ms. Legg also has polycystic ovary syndrome (PCOS), which increases the risk of some cancers.

Having just turned 40, Ms. Legg said she was determined to be as proactive as possible with cancer screenings.

Before the mammogram, she arranged for childcare for her 6-month-old daughter and filled out a required questionnaire online that asked about her history and health conditions. When the appointment day arrived, Ms. Legg made the 30-minute drive to the clinic where she was prepped for the procedure and escorted to the mammography room.

But just before the screening started, Ms. Legg happened to mention to the technician that she was breastfeeding. The surprised tech immediately halted the procedure, Ms. Legg said. Because of increased breast density caused by nursing, Ms. Legg was told to wait at least 6 weeks after weaning for a mammogram.

“I didn’t even consider that breastfeeding might prevent me from getting a mammogram,” said Ms. Legg, a writing professor from Hamilton, Ohio. “I had to go home. I was frustrated, mostly because I had driven all that way. I had hyped myself up. I had childcare in line. And now I had to wait until my daughter weaned? At the time, I didn’t know if my daughter was going to breastfeed for 2 years or be done at 6 months.”

Considering her family background, Ms. Legg worried about not receiving the screening. Her sister had recently undergone a mammogram while she was breastfeeding without any problems.

When she did research, Ms. Legg found conflicting information about the subject online so she turned to Reddit, where she started a thread asking if other moms over 40 had experienced similar issues. Dozens of moms responded with questions and concerns on the subject. Some wrote about being denied a mammogram while breastfeeding, while others wrote they received the procedure without question. Guidance from health professionals on the topic appeared to vastly differ.

“That’s why I turned to [social media] because I wasn’t finding anything else,” Ms. Legg said. “There’s just a lack of clear information. As an older mom, there’s less information out there for being postpartum and being over 40.”

Confusion over screenings during breastfeeding comes at the intersection of national guidelines lowering the recommended age for first mammograms, more women having babies later in life, and women getting breast cancer earlier.

Legg family

Most physician specialty associations agree that mammography is safe for breastfeeding patients and that they need not delay routine screenings. However, the safety of breast imaging during pregnancy and lactation is not well advertised, said Molly Peterson, MD, a radiologist based in St. Frances, Wisconsin, and lead author of a 2023 article about breast imaging during pregnancy and lactation in RadioGraphics, a journal of the Radiological Society of North America.

Conflicting information from nonscientific resources adds to the confusion, Dr. Peterson said. At the same time, health providers along the care spectrum may be uncertain about what imaging is safe and reasonable. Recommendations about mammography and lactation can also vary by institution, screening experts say.

“I’ve talked with pregnant and breastfeeding patients, both younger and older, who were unsure if they could have mammograms,” Dr. Peterson said. “I’ve also fielded questions from technologists, unclear what imaging we can offer these patients. ... Educating health professionals about evidence-based guidelines for screening and diagnostic imaging and reassuring patients about the safety of breast imaging during pregnancy and lactation is thus more important than ever.”
 

Differing Guidelines, Case-by-Case Considerations

The RadioGraphics paper emphasizes that both screening and diagnostic imaging can be safely performed using protocols based on age, breast cancer risk, and whether the patient is pregnant or lactating.

The American College of Radiology (ACR) Appropriateness Criteria also support mammography for certain patients during lactation. The guidelines state there is no contraindication to performing mammography during lactation, but note that challenges in evaluation can arise because of the unique physiological and structural breast changes that can occur.

“Hormones can change breast density and size of the breast, which could limit the clinical examination, mimic pathology, and obscure mammographic findings,” said Stamatia V. Destounis, MD, FACR, chair of the ACR Breast Imaging Commission. “It is important the patient pumps right before the mammogram or brings the baby to breastfeed prior to the imaging examination to offer the best imaging evaluation and reduce breast density as much as possible.”

In those patients who choose to prolong breastfeeding and are of the age to be screened, it is important they undergo yearly clinical breast exams, perform breast self-exams, and discuss breast cancer screening with their healthcare provider, she said. “They should not delay a routine screening mammogram. Most patients have dense breast tissue at this time, and frequently a breast ultrasound may be performed also.”

The American College of Obstetricians and Gynecologists (ACOG) does not have specific guidelines about breastfeeding mothers and mammography recommendations. Breastfeeding patients should discuss with their physicians or midwives the pros and cons of mammography, taking into account personal risk factors and how long they plan to nurse, said Joshua Copel, MD, vice chair of obstetrics, gynecology and reproductive sciences at Yale Medicine, New Haven, Connecticut, and a member of ACOG’s Committee on Obstetric Practice.

“The question for anybody to address with their physician will be, ‘Is my risk of breast cancer high enough that I should take that small risk that they’re going to over- or underread the mammogram because of my nursing status? Or should I wait until I wean the baby and have the mammogram then?’” he said.

Institutional and practice protocols meanwhile, can depend on a patient’s cancer risk.

Guidelines at the University of Wisconsin, for instance, advise that lactating patients 40 or over who are at average risk, wait 6-8 weeks after cessation of breastfeeding, said Alison Gegios, MD, a radiologist and assistant professor in breast imaging at the University of Wisconsin School of Medicine and Public Health. Average risk is defined as less than a 15% lifetime risk of breast cancer, she said.

Dr. Gegios, a coauthor on the RadioGraphics paper, said her institution recommends screening mammography if lactating patients are at intermediate or high risk, and are over 30. In such cases however, screening is generally deferred until 3-6 months after delivery, she noted.

“If patients are high risk, it’s also important to do screening breast MRIs,” Dr. Gegios said. “Studies have shown that screening breast MRIs are effective in breastfeeding patients despite their increased background parenchymal enhancement because breast cancer still stands out on our maximum intensity projections and stands out on the exam from the background.”
 

How to Clear Up Confusion, Promote Consistency

After her experience at the mammography practice, Ms. Legg went home and immediately sent a message to her ob.gyn. about what happened.

The doctor was similarly surprised and frustrated that Ms. Legg wasn’t able to get the mammogram, she said. To get around the difference in protocols, Ms. Legg’s ob.gyn. referred her to a high-risk clinic in Cincinnati. Ms. Legg’s history qualified her as high risk and she received genetic testing and a breast ultrasound at the clinic, she said.

“The ultrasound showed some shady spots,” Ms. Legg recalled. “They weren’t quite sure what they were. Another ultrasound later, they determined the spots were symmetrical and it ended up not being anything [serious]. Genetic-wise, I did not have any markers for cancer.”

Ms. Legg was relieved and she eventually received a mammogram when she finished breastfeeding, she said. However, she feels the overlap of older, breastfeeding moms and mammography guidelines deserves more attention.

“I would encourage all of us in the ‘geriatric mother’s club,’ to advocate for yourself, do your research, and also turn to your medical professionals and ask questions,” she said. “Make sure you know what they recommend for moms who are older and just had a baby.”

On the provider side, Dr. Destounis said physicians should revisit with patients the most updated guidelines about breastfeeding and mammography at routine appointments.

“Patients and their physicians have to have communication about screening for breast cancer if they are of screening age,” she said.

Dr. Copel advises physicians to run through the risks and benefits of mammograms with older, breastfeeding patients and make a shared decision. “It’s all going to vary with the individual circumstances,” he said. “If someone [has] a BRCA gene and their sister and mother had breast cancer, maybe it’s worth it. If somebody has absolutely no family history and just crossed the threshold for meeting a mammogram [recommendation], then sure, wait.”

Ms. Legg would like to see more professional literature and educational material directed toward the older, breastfeeding population about mammograms.

“At minimum, work together across departments to create an intake form, a questionnaire that is inclusive of everything,” she said. “There should be a question before you even get to the tech that asks, ‘Are you breastfeeding?’ ”

Dogs can detect stress-related compounds in the breath of people experiencing early signs of trauma, including those with posttraumatic stress disorder (PTSD), a new proof-of-concept study suggested.

The research provides evidence that some service dogs with PTSD can be trained to detect episodes of pending distress through a person’s breath and perhaps prompt the individual to use coping skills to manage the episode.

“Ours is the first study to demonstrate that at least some dogs can detect putative stress-related volatile organic compounds in human breath that are associated with PTSD symptoms,” study author Laura Kiiroja, PhD candidate, department of psychology and neuroscience, faculty of science, Dalhousie University, Halifax, Nova Scotia, Canada, told this news organization.

The study was published online on March 28, 2024, in Frontiers of Allergy.

Heightened Sense of Smell

The lifetime prevalence of PTSD is about 8% in the general population, but data show it can reach 23% in veterans. In addition, many more trauma-exposed individuals experience subthreshold symptoms.

Research is investigating the application of dogs’ sense of smell — which is up to 100,000 times more sensitive than humans’ — to detect cancers, viruses, parasites, hypoglycemia, and seizures in humans.

There is also some evidence that dogs can detect putative stress-related volatile organic compounds (VOCs) such as isoprene and monoterpenes from the human body through urine, sweat, and breath, with the greatest success achieved with breath.

The new study included 26 mostly civilian “donors” (mean age, 31 years; 18 females) who had experienced various types of trauma but had no severe mental illness. More than 50% met the criteria for PTSD.

Participants were recruited from a study examining neurocognitive mechanisms underlying the potential links between trauma and cannabis use. However, participants in the dog study abstained from using cannabis for at least 12 hours prior to the study experiments.

Breath Donors

Breath samples were collected via disposable medical-grade face masks at baseline and during ensuing experiments. In total, 40 breath sample sets were collected.

Two female companion dogs — Ivy, a red golden retriever, and Callie, a German shepherd/Belgian Malinois mix — were trained to identify target odors from the samples.

The animals were tested to determine whether they were able to discriminate between breath samples collected from these same “breath donors” during a relatively relaxed state and during induced stress testing which is known as the alternative forced choice discrimination test.

The dogs’ ability to discern trauma cues from breath samples of various individuals was tested by presenting one sample (baseline or trauma cue) at a time. The researchers used signal detection theory to evaluate the sensitivity and specificity of dogs in detecting human stress VOCs.

Investigators found the dogs had about a 90% accuracy rate across all sample sets in the discrimination experiment and 74% and 81% accuracy for Ivy and Callie, respectively, in the detection experiment.

“Our study contributed to the evidence showing that not only are dogs able to detect some physical health conditions in humans but also that some mental health conditions alter the released VOCs in a way that is detectable by dogs,” Ms. Kiiroja said.

Emotion Detectors

At baseline and during each cue exposure, donors reported their affect using the Positive and Negative Affect Schedule. Ivy’s performance correlated with the donors’ self-reported anxiety, and Callie’s performance correlated with the donors’ self-reported shame.

Based on these correlations, the researchers speculate Ivy detected VOCs that likely originated from the sympathetic-adrenomedullary axis, which involves adrenaline and noradrenaline.

VOCs detected by Callie likely originated in the hypothalamus-pituitary-adrenal axis, which involves cortisol and corticosterone. These two endocrine subsystems play a major role in reestablishing homeostasis in response to a stressor.

The results suggest some service dogs could alert to upcoming intrusion and hyperarousal symptoms even before physical signs manifest and before the person is even aware of the situation, said Ms. Kiiroja.

“This would enable earlier distraction and reminders to use skills learned in psychotherapy; this would have a better likelihood of increasing the efficacy of these skills and preventing further escalation of the arousal,” she said.

Most breath samples likely included both early and late stress VOCs, as the breath donors wore the trauma mask for a relatively long time, the authors noted. Future studies should test dogs’ olfactory acuity on samples collected minutes after the trauma cue, they added.

Another limitation is that all donors were regular cannabis users, so the results may not generalize to others. However, the fact the dogs demonstrated their detection ability even with cannabis users makes the proof-of-concept “more stringent,” Ms. Kiiroja said.

The goal of the study was to see if some dogs are capable of detecting stress VOCs from people with trauma histories in response to trauma cues, so the small number of dogs in the study isn’t a limitation, the authors noted.

‘Wonderful Work’

Commenting on the findings, Elspeth Ritchie, MD, chair of psychiatry, MedStar Washington Hospital Center, Washington, described the research as “wonderful work.” Dr. Ritchie, who was not a part of this study, has also studied PTSD supports dogs.

The study is yet another illustration of the “amazing things dogs can do ... not just for veterans but for people with mental illness.” They can be a source of comfort and help people manage their anxiety.

Training PTSD service dogs can be expensive, with some well-accredited organizations charging about $50,000 for an animal, Dr. Ritchie said. Training a dog to detect VOCs could also be costly, she added.

Although such research has increased in recent years, it’s unclear how it would be applied in practice. Identifying funding for this sort of study and designing trials would also be challenging, Dr. Ritchie added.

“The idea is good, but when you try to operationalize it, it gets tricky,” she said.

The fact that all donors in the study used cannabis is a confounding factor and raises the question of what else might confound the results, Dr. Ritchie added.

Dr. Ritchie emphasized that although ideally veterans would learn to recognize the onset of stress symptoms themselves, a dog could serve as a valuable companion in this process. “That’s precisely why this research should progress,” she said.

The authors and Dr. Ritchie reported no relevant disclosures.
 

A version of this article appeared on Medscape.com.

Dogs can detect stress-related compounds in the breath of people experiencing early signs of trauma, including those with posttraumatic stress disorder (PTSD), a new proof-of-concept study suggested.

The research provides evidence that some service dogs with PTSD can be trained to detect episodes of pending distress through a person’s breath and perhaps prompt the individual to use coping skills to manage the episode.

“Ours is the first study to demonstrate that at least some dogs can detect putative stress-related volatile organic compounds in human breath that are associated with PTSD symptoms,” study author Laura Kiiroja, PhD candidate, department of psychology and neuroscience, faculty of science, Dalhousie University, Halifax, Nova Scotia, Canada, told this news organization.

The study was published online on March 28, 2024, in Frontiers of Allergy.

Heightened Sense of Smell

The lifetime prevalence of PTSD is about 8% in the general population, but data show it can reach 23% in veterans. In addition, many more trauma-exposed individuals experience subthreshold symptoms.

Research is investigating the application of dogs’ sense of smell — which is up to 100,000 times more sensitive than humans’ — to detect cancers, viruses, parasites, hypoglycemia, and seizures in humans.

There is also some evidence that dogs can detect putative stress-related volatile organic compounds (VOCs) such as isoprene and monoterpenes from the human body through urine, sweat, and breath, with the greatest success achieved with breath.

The new study included 26 mostly civilian “donors” (mean age, 31 years; 18 females) who had experienced various types of trauma but had no severe mental illness. More than 50% met the criteria for PTSD.

Participants were recruited from a study examining neurocognitive mechanisms underlying the potential links between trauma and cannabis use. However, participants in the dog study abstained from using cannabis for at least 12 hours prior to the study experiments.

Breath Donors

Breath samples were collected via disposable medical-grade face masks at baseline and during ensuing experiments. In total, 40 breath sample sets were collected.

Two female companion dogs — Ivy, a red golden retriever, and Callie, a German shepherd/Belgian Malinois mix — were trained to identify target odors from the samples.

The animals were tested to determine whether they were able to discriminate between breath samples collected from these same “breath donors” during a relatively relaxed state and during induced stress testing which is known as the alternative forced choice discrimination test.

The dogs’ ability to discern trauma cues from breath samples of various individuals was tested by presenting one sample (baseline or trauma cue) at a time. The researchers used signal detection theory to evaluate the sensitivity and specificity of dogs in detecting human stress VOCs.

Investigators found the dogs had about a 90% accuracy rate across all sample sets in the discrimination experiment and 74% and 81% accuracy for Ivy and Callie, respectively, in the detection experiment.

“Our study contributed to the evidence showing that not only are dogs able to detect some physical health conditions in humans but also that some mental health conditions alter the released VOCs in a way that is detectable by dogs,” Ms. Kiiroja said.

Emotion Detectors

At baseline and during each cue exposure, donors reported their affect using the Positive and Negative Affect Schedule. Ivy’s performance correlated with the donors’ self-reported anxiety, and Callie’s performance correlated with the donors’ self-reported shame.

Based on these correlations, the researchers speculate Ivy detected VOCs that likely originated from the sympathetic-adrenomedullary axis, which involves adrenaline and noradrenaline.

VOCs detected by Callie likely originated in the hypothalamus-pituitary-adrenal axis, which involves cortisol and corticosterone. These two endocrine subsystems play a major role in reestablishing homeostasis in response to a stressor.

The results suggest some service dogs could alert to upcoming intrusion and hyperarousal symptoms even before physical signs manifest and before the person is even aware of the situation, said Ms. Kiiroja.

“This would enable earlier distraction and reminders to use skills learned in psychotherapy; this would have a better likelihood of increasing the efficacy of these skills and preventing further escalation of the arousal,” she said.

Most breath samples likely included both early and late stress VOCs, as the breath donors wore the trauma mask for a relatively long time, the authors noted. Future studies should test dogs’ olfactory acuity on samples collected minutes after the trauma cue, they added.

Another limitation is that all donors were regular cannabis users, so the results may not generalize to others. However, the fact the dogs demonstrated their detection ability even with cannabis users makes the proof-of-concept “more stringent,” Ms. Kiiroja said.

The goal of the study was to see if some dogs are capable of detecting stress VOCs from people with trauma histories in response to trauma cues, so the small number of dogs in the study isn’t a limitation, the authors noted.

‘Wonderful Work’

Commenting on the findings, Elspeth Ritchie, MD, chair of psychiatry, MedStar Washington Hospital Center, Washington, described the research as “wonderful work.” Dr. Ritchie, who was not a part of this study, has also studied PTSD supports dogs.

The study is yet another illustration of the “amazing things dogs can do ... not just for veterans but for people with mental illness.” They can be a source of comfort and help people manage their anxiety.

Training PTSD service dogs can be expensive, with some well-accredited organizations charging about $50,000 for an animal, Dr. Ritchie said. Training a dog to detect VOCs could also be costly, she added.

Although such research has increased in recent years, it’s unclear how it would be applied in practice. Identifying funding for this sort of study and designing trials would also be challenging, Dr. Ritchie added.

“The idea is good, but when you try to operationalize it, it gets tricky,” she said.

The fact that all donors in the study used cannabis is a confounding factor and raises the question of what else might confound the results, Dr. Ritchie added.

Dr. Ritchie emphasized that although ideally veterans would learn to recognize the onset of stress symptoms themselves, a dog could serve as a valuable companion in this process. “That’s precisely why this research should progress,” she said.

The authors and Dr. Ritchie reported no relevant disclosures.
 

A version of this article appeared on Medscape.com.

Dogs can detect stress-related compounds in the breath of people experiencing early signs of trauma, including those with posttraumatic stress disorder (PTSD), a new proof-of-concept study suggested.

The research provides evidence that some service dogs with PTSD can be trained to detect episodes of pending distress through a person’s breath and perhaps prompt the individual to use coping skills to manage the episode.

“Ours is the first study to demonstrate that at least some dogs can detect putative stress-related volatile organic compounds in human breath that are associated with PTSD symptoms,” study author Laura Kiiroja, PhD candidate, department of psychology and neuroscience, faculty of science, Dalhousie University, Halifax, Nova Scotia, Canada, told this news organization.

The study was published online on March 28, 2024, in Frontiers of Allergy.

Heightened Sense of Smell

The lifetime prevalence of PTSD is about 8% in the general population, but data show it can reach 23% in veterans. In addition, many more trauma-exposed individuals experience subthreshold symptoms.

Research is investigating the application of dogs’ sense of smell — which is up to 100,000 times more sensitive than humans’ — to detect cancers, viruses, parasites, hypoglycemia, and seizures in humans.

There is also some evidence that dogs can detect putative stress-related volatile organic compounds (VOCs) such as isoprene and monoterpenes from the human body through urine, sweat, and breath, with the greatest success achieved with breath.

The new study included 26 mostly civilian “donors” (mean age, 31 years; 18 females) who had experienced various types of trauma but had no severe mental illness. More than 50% met the criteria for PTSD.

Participants were recruited from a study examining neurocognitive mechanisms underlying the potential links between trauma and cannabis use. However, participants in the dog study abstained from using cannabis for at least 12 hours prior to the study experiments.

Breath Donors

Breath samples were collected via disposable medical-grade face masks at baseline and during ensuing experiments. In total, 40 breath sample sets were collected.

Two female companion dogs — Ivy, a red golden retriever, and Callie, a German shepherd/Belgian Malinois mix — were trained to identify target odors from the samples.

The animals were tested to determine whether they were able to discriminate between breath samples collected from these same “breath donors” during a relatively relaxed state and during induced stress testing which is known as the alternative forced choice discrimination test.

The dogs’ ability to discern trauma cues from breath samples of various individuals was tested by presenting one sample (baseline or trauma cue) at a time. The researchers used signal detection theory to evaluate the sensitivity and specificity of dogs in detecting human stress VOCs.

Investigators found the dogs had about a 90% accuracy rate across all sample sets in the discrimination experiment and 74% and 81% accuracy for Ivy and Callie, respectively, in the detection experiment.

“Our study contributed to the evidence showing that not only are dogs able to detect some physical health conditions in humans but also that some mental health conditions alter the released VOCs in a way that is detectable by dogs,” Ms. Kiiroja said.

Emotion Detectors

At baseline and during each cue exposure, donors reported their affect using the Positive and Negative Affect Schedule. Ivy’s performance correlated with the donors’ self-reported anxiety, and Callie’s performance correlated with the donors’ self-reported shame.

Based on these correlations, the researchers speculate Ivy detected VOCs that likely originated from the sympathetic-adrenomedullary axis, which involves adrenaline and noradrenaline.

VOCs detected by Callie likely originated in the hypothalamus-pituitary-adrenal axis, which involves cortisol and corticosterone. These two endocrine subsystems play a major role in reestablishing homeostasis in response to a stressor.

The results suggest some service dogs could alert to upcoming intrusion and hyperarousal symptoms even before physical signs manifest and before the person is even aware of the situation, said Ms. Kiiroja.

“This would enable earlier distraction and reminders to use skills learned in psychotherapy; this would have a better likelihood of increasing the efficacy of these skills and preventing further escalation of the arousal,” she said.

Most breath samples likely included both early and late stress VOCs, as the breath donors wore the trauma mask for a relatively long time, the authors noted. Future studies should test dogs’ olfactory acuity on samples collected minutes after the trauma cue, they added.

Another limitation is that all donors were regular cannabis users, so the results may not generalize to others. However, the fact the dogs demonstrated their detection ability even with cannabis users makes the proof-of-concept “more stringent,” Ms. Kiiroja said.

The goal of the study was to see if some dogs are capable of detecting stress VOCs from people with trauma histories in response to trauma cues, so the small number of dogs in the study isn’t a limitation, the authors noted.

‘Wonderful Work’

Commenting on the findings, Elspeth Ritchie, MD, chair of psychiatry, MedStar Washington Hospital Center, Washington, described the research as “wonderful work.” Dr. Ritchie, who was not a part of this study, has also studied PTSD supports dogs.

The study is yet another illustration of the “amazing things dogs can do ... not just for veterans but for people with mental illness.” They can be a source of comfort and help people manage their anxiety.

Training PTSD service dogs can be expensive, with some well-accredited organizations charging about $50,000 for an animal, Dr. Ritchie said. Training a dog to detect VOCs could also be costly, she added.

Although such research has increased in recent years, it’s unclear how it would be applied in practice. Identifying funding for this sort of study and designing trials would also be challenging, Dr. Ritchie added.

“The idea is good, but when you try to operationalize it, it gets tricky,” she said.

The fact that all donors in the study used cannabis is a confounding factor and raises the question of what else might confound the results, Dr. Ritchie added.

Dr. Ritchie emphasized that although ideally veterans would learn to recognize the onset of stress symptoms themselves, a dog could serve as a valuable companion in this process. “That’s precisely why this research should progress,” she said.

The authors and Dr. Ritchie reported no relevant disclosures.
 

A version of this article appeared on Medscape.com.

This case is a little out of the ordinary, but we would love to find out how readers would handle it.

Diana is a 51-year-old woman with a history of depression, obesity, hypertension, type 2 diabetes, and coronary artery disease. She has come in for a routine visit for her chronic illnesses. She seems very distant and has a flat affect during the initial interview. When you ask about any recent stressful events, she begins crying and explains that her daughter was just deported, leaving behind a child and boyfriend.

Their country of origin suffers from chronic instability and violence. Diana’s father was murdered there, and Diana was the victim of sexual assault. “I escaped when I was 18, and I tried to never look back. Until now.” Diana is very worried about her daughter’s return to that country. “I don’t want her to have to endure what I have endured.”

You spend some time discussing the patient’s mental health burden and identify a counselor and online resources that might help. You wonder if Diana’s adverse childhood experiences (ACEs) might have contributed to some of her physical illnesses.

ACEs and Adult Health

The effects of trauma run long and deep. ACEs have been associated with higher risks for multiple chronic conditions, even among adults aged 60 years or older. Therefore, clinicians should consider a patient’s history of ACEs as part of their evaluation of risk for chronic illness.

One of the most pronounced and straightforward links is that between ACEs and depression. In the Southern Community Cohort Study of more than 38,200 US adults, the highest odds ratio between ACEs and chronic disease was for depression. Persons who reported more than three ACEs had about a twofold increase in the risk for depression compared with persons without ACEs. There was a monotonic increase in the risk for depression and other chronic illnesses as the burden of ACEs increased.

In another study from the United Kingdom, each additional ACE was associated with a significant 11% increase in the risk for incident diabetes during adulthood. Researchers found that both depression symptoms and cardiometabolic dysfunction mediated the effects of ACEs in promoting higher rates of diabetes.

Depression and diabetes are significant risk factors for coronary artery disease, so it is not surprising that ACEs are also associated with a higher risk for coronary events. A review by Godoy and colleagues described how ACEs promote neuroendocrine, autonomic, and inflammatory dysfunction, which in turn leads to higher rates of traditional cardiovascular risk factors such as diabetes and obesity. Ultimately, the presence of four or more ACEs is associated with more than a twofold higher risk for cardiovascular disease compared with no ACEs.

Many of the pathologic processes that promote cardiovascular disease also increase the risk for dementia. Could the reach of ACEs span decades to promote a higher risk for dementia among older adults? A study by Yuan and colleagues of 7222 Chinese adults suggests that the answer is yes. This study divided the cohort into persons with a history of no ACEs, household dysfunction during childhood, or mistreatment during childhood. Child mistreatment was associated with higher rates of diabetes, depression, and cardiovascular disease, as well as an odds ratio of 1.37 (95% CI, 1.12 to 1.68) for cognitive impairment.

The magnitude of the effects ACEs can have on well-being is reinforced by epidemiologic data surrounding ACEs. According to the US Centers for Disease Control and Prevention (CDC), 64% of US adults report at least one ACE and 17% experienced at least four ACEs. Risk factors for ACEs include being female, American Indian or Alaska Native, or unemployed.

How do we reduce the impact of ACEs? Prevention is key. The CDC estimates that nearly 2 million cases of adult heart disease and more than 20 million cases of adult depression could be avoided if ACEs were eliminated.

But what is the best means to pragmatically reduce ACEs in our current practice models? How do we discover a history of ACEs in patients, and what are the best practices in managing persons with a positive history? We will cover these critical subjects in a future article, but for now, please provide your own comments and pearls regarding the prevention and management of ACEs.

Dr. Vega, health sciences clinical professor, family medicine, University of California, Irvine, disclosed ties with GlaxoSmithKline and Johnson and Johnson. Ms. Hurtado, MD candidate, University of California, Irvine School of Medicine, has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

This case is a little out of the ordinary, but we would love to find out how readers would handle it.

Diana is a 51-year-old woman with a history of depression, obesity, hypertension, type 2 diabetes, and coronary artery disease. She has come in for a routine visit for her chronic illnesses. She seems very distant and has a flat affect during the initial interview. When you ask about any recent stressful events, she begins crying and explains that her daughter was just deported, leaving behind a child and boyfriend.

Their country of origin suffers from chronic instability and violence. Diana’s father was murdered there, and Diana was the victim of sexual assault. “I escaped when I was 18, and I tried to never look back. Until now.” Diana is very worried about her daughter’s return to that country. “I don’t want her to have to endure what I have endured.”

You spend some time discussing the patient’s mental health burden and identify a counselor and online resources that might help. You wonder if Diana’s adverse childhood experiences (ACEs) might have contributed to some of her physical illnesses.

ACEs and Adult Health

The effects of trauma run long and deep. ACEs have been associated with higher risks for multiple chronic conditions, even among adults aged 60 years or older. Therefore, clinicians should consider a patient’s history of ACEs as part of their evaluation of risk for chronic illness.

One of the most pronounced and straightforward links is that between ACEs and depression. In the Southern Community Cohort Study of more than 38,200 US adults, the highest odds ratio between ACEs and chronic disease was for depression. Persons who reported more than three ACEs had about a twofold increase in the risk for depression compared with persons without ACEs. There was a monotonic increase in the risk for depression and other chronic illnesses as the burden of ACEs increased.

In another study from the United Kingdom, each additional ACE was associated with a significant 11% increase in the risk for incident diabetes during adulthood. Researchers found that both depression symptoms and cardiometabolic dysfunction mediated the effects of ACEs in promoting higher rates of diabetes.

Depression and diabetes are significant risk factors for coronary artery disease, so it is not surprising that ACEs are also associated with a higher risk for coronary events. A review by Godoy and colleagues described how ACEs promote neuroendocrine, autonomic, and inflammatory dysfunction, which in turn leads to higher rates of traditional cardiovascular risk factors such as diabetes and obesity. Ultimately, the presence of four or more ACEs is associated with more than a twofold higher risk for cardiovascular disease compared with no ACEs.

Many of the pathologic processes that promote cardiovascular disease also increase the risk for dementia. Could the reach of ACEs span decades to promote a higher risk for dementia among older adults? A study by Yuan and colleagues of 7222 Chinese adults suggests that the answer is yes. This study divided the cohort into persons with a history of no ACEs, household dysfunction during childhood, or mistreatment during childhood. Child mistreatment was associated with higher rates of diabetes, depression, and cardiovascular disease, as well as an odds ratio of 1.37 (95% CI, 1.12 to 1.68) for cognitive impairment.

The magnitude of the effects ACEs can have on well-being is reinforced by epidemiologic data surrounding ACEs. According to the US Centers for Disease Control and Prevention (CDC), 64% of US adults report at least one ACE and 17% experienced at least four ACEs. Risk factors for ACEs include being female, American Indian or Alaska Native, or unemployed.

How do we reduce the impact of ACEs? Prevention is key. The CDC estimates that nearly 2 million cases of adult heart disease and more than 20 million cases of adult depression could be avoided if ACEs were eliminated.

But what is the best means to pragmatically reduce ACEs in our current practice models? How do we discover a history of ACEs in patients, and what are the best practices in managing persons with a positive history? We will cover these critical subjects in a future article, but for now, please provide your own comments and pearls regarding the prevention and management of ACEs.

Dr. Vega, health sciences clinical professor, family medicine, University of California, Irvine, disclosed ties with GlaxoSmithKline and Johnson and Johnson. Ms. Hurtado, MD candidate, University of California, Irvine School of Medicine, has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

This case is a little out of the ordinary, but we would love to find out how readers would handle it.

Diana is a 51-year-old woman with a history of depression, obesity, hypertension, type 2 diabetes, and coronary artery disease. She has come in for a routine visit for her chronic illnesses. She seems very distant and has a flat affect during the initial interview. When you ask about any recent stressful events, she begins crying and explains that her daughter was just deported, leaving behind a child and boyfriend.

Their country of origin suffers from chronic instability and violence. Diana’s father was murdered there, and Diana was the victim of sexual assault. “I escaped when I was 18, and I tried to never look back. Until now.” Diana is very worried about her daughter’s return to that country. “I don’t want her to have to endure what I have endured.”

You spend some time discussing the patient’s mental health burden and identify a counselor and online resources that might help. You wonder if Diana’s adverse childhood experiences (ACEs) might have contributed to some of her physical illnesses.

ACEs and Adult Health

The effects of trauma run long and deep. ACEs have been associated with higher risks for multiple chronic conditions, even among adults aged 60 years or older. Therefore, clinicians should consider a patient’s history of ACEs as part of their evaluation of risk for chronic illness.

One of the most pronounced and straightforward links is that between ACEs and depression. In the Southern Community Cohort Study of more than 38,200 US adults, the highest odds ratio between ACEs and chronic disease was for depression. Persons who reported more than three ACEs had about a twofold increase in the risk for depression compared with persons without ACEs. There was a monotonic increase in the risk for depression and other chronic illnesses as the burden of ACEs increased.

In another study from the United Kingdom, each additional ACE was associated with a significant 11% increase in the risk for incident diabetes during adulthood. Researchers found that both depression symptoms and cardiometabolic dysfunction mediated the effects of ACEs in promoting higher rates of diabetes.

Depression and diabetes are significant risk factors for coronary artery disease, so it is not surprising that ACEs are also associated with a higher risk for coronary events. A review by Godoy and colleagues described how ACEs promote neuroendocrine, autonomic, and inflammatory dysfunction, which in turn leads to higher rates of traditional cardiovascular risk factors such as diabetes and obesity. Ultimately, the presence of four or more ACEs is associated with more than a twofold higher risk for cardiovascular disease compared with no ACEs.

Many of the pathologic processes that promote cardiovascular disease also increase the risk for dementia. Could the reach of ACEs span decades to promote a higher risk for dementia among older adults? A study by Yuan and colleagues of 7222 Chinese adults suggests that the answer is yes. This study divided the cohort into persons with a history of no ACEs, household dysfunction during childhood, or mistreatment during childhood. Child mistreatment was associated with higher rates of diabetes, depression, and cardiovascular disease, as well as an odds ratio of 1.37 (95% CI, 1.12 to 1.68) for cognitive impairment.

The magnitude of the effects ACEs can have on well-being is reinforced by epidemiologic data surrounding ACEs. According to the US Centers for Disease Control and Prevention (CDC), 64% of US adults report at least one ACE and 17% experienced at least four ACEs. Risk factors for ACEs include being female, American Indian or Alaska Native, or unemployed.

How do we reduce the impact of ACEs? Prevention is key. The CDC estimates that nearly 2 million cases of adult heart disease and more than 20 million cases of adult depression could be avoided if ACEs were eliminated.

But what is the best means to pragmatically reduce ACEs in our current practice models? How do we discover a history of ACEs in patients, and what are the best practices in managing persons with a positive history? We will cover these critical subjects in a future article, but for now, please provide your own comments and pearls regarding the prevention and management of ACEs.

Dr. Vega, health sciences clinical professor, family medicine, University of California, Irvine, disclosed ties with GlaxoSmithKline and Johnson and Johnson. Ms. Hurtado, MD candidate, University of California, Irvine School of Medicine, has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

SAN DIEGO — In the clinical opinion of Jenny E. Murase, MD, caring for patients with delusional infestation — the conviction that one is infested by animate or inanimate pathogens without medical or microbiological evidence of a true infestation — puts a dermatologist’s communication skills to the ultimate test.

“The fact that delusional infestation is a fixed, false belief [means] we will never agree with patients on the etiology by definition,” Dr. Murase, a dermatologist with the Palo Alto Foundation Medical Group, Mountain View, California, said at the annual meeting of the American Academy of Dermatology. “But somehow, we must come to some kind of an agreement on how to approach this therapeutically.”

Patients with delusional infestation (DI) often describe a cutaneous sensation of itching or crawling, biting, stinging — a pins and needles sensation. “Formication is when there’s a crawling sensation on the surface of the skin,” she said. “That’s something we can agree on — the fact that there is a shared understanding that they’re experiencing some kind of sensation in their skin.”

First described in 1894, several different terms have been used to describe DI in the past, including acarophobia, delusions of parasitosis, Ekbom syndrome, and Morgellons disease. The current term used for DI includes other animate or inanimate pathogens besides parasites.

The average dermatologist manages two to three patients with DI every 5 years, “so it’s not uncommon,” said Dr. Murase, who also holds a faculty position in the department of dermatology at the University of California, San Francisco. Females are about 2.5 times more likely to be affected compared with males, she said, and 8%-12% of patients with DI have a friend or relative who shares the symptom, and they often accompany them to the office visit. “Initially, you’re trying to determine if this a primary condition where it’s only the cutaneous condition the patient is experiencing, or if there is a secondary condition like an underlying psychiatric disorder or medical condition or drug use that contributes to the sensation,” she said.

According to a descriptive study of 115 patients with DI, 50% had at least one drug detected in hair samples, and nearly 60% had evidence of some cognitive impairment that could not be explained by deficits in IQ. Another study of 147 patients with DI seen at the Mayo Clinic between 2001 and 2007 found that 81% had a prior psychiatric condition and 26% had a shared psychotic disorder.
 

Phased Approach to Treatment

Dr. Murase discussed her phased approach to caring for patients with DI, based on a review article that she and colleagues published in the International Journal of Dermatology. Phase 1 involves preparing for the visit by asking staff to refer to patients with DI as VIPs and allowing them to talk freely about the sensation they’re experiencing. “The goal is to improve the patient’s condition, not to convince the patient that he or she is delusional,” Dr. Murase explained. “Many patients can’t distinguish between when they’re talking to the doctor and when they’re talking to a nurse or a nurse practitioner; they like to feel that they’re being heard and listened to.”

She also recommends scheduling patients with DI for the end of the day and arranging frequent follow-up visits. “Making them feel valued is the bottom line,” she emphasized. “Remember: They’re less likely to respect socially defined boundaries like time constraints, so you do have to set boundaries, and don’t take what they may say to you personally. You’re not going to be able to care for that individual unless you do that. They may appear defiant, frustrated, and angry, but the fact that they showed up in your office means that you can help that person.”

Phase 2 of care for these patients consists of building a therapeutic rapport by greeting them with a smile and positive attitude and using welcoming body language such as sitting side-by-side during the office visit as opposed to face-to-face, “so it’s a less aggressive approach,” she said. Next, ask about their goal with a question such as, “Is it more important for you to find the bug/virus or to improve your condition?”

During the visit, “you’re continually shifting from etiology — which they are desperate to understand — to a shared desire for treatment,” Dr. Murase said. “No one knows what causes DI and remember, in medicine we treat patients when the exact etiology is unknown. So, we’re not doing anything that differently. Focus on the effect that the symptoms are having on their life. Say something like, ‘it must be so miserable to be living this way. I really want to help you.’ ”

Phase 3 of care for patients with DI involves performing a thorough history and physical exam. The initial office visit should include a full body exam to rule out any underlying dermatologic condition that may be causing the sensation they’re complaining about. She cited a retrospective study of 108 patients who presented to the Mayo Clinic with DI as the main reason for their office visit. Of the 80 patients who had a biopsy, 61% had chronic dermatitis; 48% had excoriation, ulceration, or erosion; and 31% had nonspecific dermal inflammation.

Whether to perform a biopsy or not is controversial, Dr. Murase added, because it’s probably not going to change the clinical impression or diagnosis. “If you agree to do the biopsy, get a verbal contract with the patient,” she advised. “You might say, ‘We’re going to do this. You’re going to choose the site, we’re going to do a biopsy, but we are going to be in agreement here that, if we can’t find the etiology, that you will still be open to going on therapy.’ This is important because it establishes a therapeutic alliance.”

Since patients with DI often bring in their own specimens, she also recommends providing them with microscope glass slides without cover slips and asking them to use clear tape, not tape that is opaque or matted, to cover the specimen.

To rule out other illnesses and conditions that could be triggering the perceived DI, she said lab tests to consider include a complete blood count, comprehensive metabolic panel, thyroid-stimulating hormone, calcium, hemoglobin A1c, vitamin B12, urinalysis, toxicology screen, HIV/hepatitis C, and rapid plasma reagin.
 

Starting Treatment

Phase 4 of care for patients with DI involves initiating therapy, which includes demonstrating empathy by reflecting on the detrimental effects of the patient’s reported sensations on their quality of life. “Emphasize that you are not questioning their experience, and that you don’t doubt that they feel things on their skin,” Dr. Murase said. “Recommend medications on an empirical or ‘trial and error’ pragmatic basis. I often tell patients, ‘I will never give up on you if you will never give up on me.’”

For treating patients with DI, her first-generation antipsychotic of choice is pimozide. She starts at a dose of 0.5 mg, building up to 2-3 mg once a day. Haloperidol is another option: 0.5 mg to start, building up to 1-5 mg every night at bedtime. “This requires monitoring for bone suppression via CBC and hypermetabolic complications via fasting lipids and HbA1c,” she said. “There is also an increased risk of prolonged QT with pimozide and risk of extrapyramidal symptoms and tardive dyskinesia.”

Second-generation antipsychotics to consider include risperidone (0.5 mg to start, building up to 102 mg at bedtime); olanzapine (2.5 mg to start, building up to 5-10 mg at bedtime); aripiprazole (2-5 mg to start, building up to 10-15 mg a day), and quetiapine (12.5 mg to start, building up to 200 mg at bedtime).

For all medical therapy she recommends starting patients with a low dose, increasing by 0.5 mg every 2-3 weeks, and let them be “stable and comfortable” for 3-4 months, and then taper down the dose by 0.5 mg every 2-4 weeks or more slowly. In the medical chart, Dr. Murase recommends avoiding use of the terms “psychosis” and “delusions.” Instead, “formication” (tactile hallucination of insects crawling on or within the skin) or “cutaneous dysesthesia” are better terms if patients access their records, she said.

Dr. Murase reported having no relevant disclosures.

SAN DIEGO — In the clinical opinion of Jenny E. Murase, MD, caring for patients with delusional infestation — the conviction that one is infested by animate or inanimate pathogens without medical or microbiological evidence of a true infestation — puts a dermatologist’s communication skills to the ultimate test.

“The fact that delusional infestation is a fixed, false belief [means] we will never agree with patients on the etiology by definition,” Dr. Murase, a dermatologist with the Palo Alto Foundation Medical Group, Mountain View, California, said at the annual meeting of the American Academy of Dermatology. “But somehow, we must come to some kind of an agreement on how to approach this therapeutically.”

Patients with delusional infestation (DI) often describe a cutaneous sensation of itching or crawling, biting, stinging — a pins and needles sensation. “Formication is when there’s a crawling sensation on the surface of the skin,” she said. “That’s something we can agree on — the fact that there is a shared understanding that they’re experiencing some kind of sensation in their skin.”

First described in 1894, several different terms have been used to describe DI in the past, including acarophobia, delusions of parasitosis, Ekbom syndrome, and Morgellons disease. The current term used for DI includes other animate or inanimate pathogens besides parasites.

The average dermatologist manages two to three patients with DI every 5 years, “so it’s not uncommon,” said Dr. Murase, who also holds a faculty position in the department of dermatology at the University of California, San Francisco. Females are about 2.5 times more likely to be affected compared with males, she said, and 8%-12% of patients with DI have a friend or relative who shares the symptom, and they often accompany them to the office visit. “Initially, you’re trying to determine if this a primary condition where it’s only the cutaneous condition the patient is experiencing, or if there is a secondary condition like an underlying psychiatric disorder or medical condition or drug use that contributes to the sensation,” she said.

According to a descriptive study of 115 patients with DI, 50% had at least one drug detected in hair samples, and nearly 60% had evidence of some cognitive impairment that could not be explained by deficits in IQ. Another study of 147 patients with DI seen at the Mayo Clinic between 2001 and 2007 found that 81% had a prior psychiatric condition and 26% had a shared psychotic disorder.
 

Phased Approach to Treatment

Dr. Murase discussed her phased approach to caring for patients with DI, based on a review article that she and colleagues published in the International Journal of Dermatology. Phase 1 involves preparing for the visit by asking staff to refer to patients with DI as VIPs and allowing them to talk freely about the sensation they’re experiencing. “The goal is to improve the patient’s condition, not to convince the patient that he or she is delusional,” Dr. Murase explained. “Many patients can’t distinguish between when they’re talking to the doctor and when they’re talking to a nurse or a nurse practitioner; they like to feel that they’re being heard and listened to.”

She also recommends scheduling patients with DI for the end of the day and arranging frequent follow-up visits. “Making them feel valued is the bottom line,” she emphasized. “Remember: They’re less likely to respect socially defined boundaries like time constraints, so you do have to set boundaries, and don’t take what they may say to you personally. You’re not going to be able to care for that individual unless you do that. They may appear defiant, frustrated, and angry, but the fact that they showed up in your office means that you can help that person.”

Phase 2 of care for these patients consists of building a therapeutic rapport by greeting them with a smile and positive attitude and using welcoming body language such as sitting side-by-side during the office visit as opposed to face-to-face, “so it’s a less aggressive approach,” she said. Next, ask about their goal with a question such as, “Is it more important for you to find the bug/virus or to improve your condition?”

During the visit, “you’re continually shifting from etiology — which they are desperate to understand — to a shared desire for treatment,” Dr. Murase said. “No one knows what causes DI and remember, in medicine we treat patients when the exact etiology is unknown. So, we’re not doing anything that differently. Focus on the effect that the symptoms are having on their life. Say something like, ‘it must be so miserable to be living this way. I really want to help you.’ ”

Phase 3 of care for patients with DI involves performing a thorough history and physical exam. The initial office visit should include a full body exam to rule out any underlying dermatologic condition that may be causing the sensation they’re complaining about. She cited a retrospective study of 108 patients who presented to the Mayo Clinic with DI as the main reason for their office visit. Of the 80 patients who had a biopsy, 61% had chronic dermatitis; 48% had excoriation, ulceration, or erosion; and 31% had nonspecific dermal inflammation.

Whether to perform a biopsy or not is controversial, Dr. Murase added, because it’s probably not going to change the clinical impression or diagnosis. “If you agree to do the biopsy, get a verbal contract with the patient,” she advised. “You might say, ‘We’re going to do this. You’re going to choose the site, we’re going to do a biopsy, but we are going to be in agreement here that, if we can’t find the etiology, that you will still be open to going on therapy.’ This is important because it establishes a therapeutic alliance.”

Since patients with DI often bring in their own specimens, she also recommends providing them with microscope glass slides without cover slips and asking them to use clear tape, not tape that is opaque or matted, to cover the specimen.

To rule out other illnesses and conditions that could be triggering the perceived DI, she said lab tests to consider include a complete blood count, comprehensive metabolic panel, thyroid-stimulating hormone, calcium, hemoglobin A1c, vitamin B12, urinalysis, toxicology screen, HIV/hepatitis C, and rapid plasma reagin.
 

Starting Treatment

Phase 4 of care for patients with DI involves initiating therapy, which includes demonstrating empathy by reflecting on the detrimental effects of the patient’s reported sensations on their quality of life. “Emphasize that you are not questioning their experience, and that you don’t doubt that they feel things on their skin,” Dr. Murase said. “Recommend medications on an empirical or ‘trial and error’ pragmatic basis. I often tell patients, ‘I will never give up on you if you will never give up on me.’”

For treating patients with DI, her first-generation antipsychotic of choice is pimozide. She starts at a dose of 0.5 mg, building up to 2-3 mg once a day. Haloperidol is another option: 0.5 mg to start, building up to 1-5 mg every night at bedtime. “This requires monitoring for bone suppression via CBC and hypermetabolic complications via fasting lipids and HbA1c,” she said. “There is also an increased risk of prolonged QT with pimozide and risk of extrapyramidal symptoms and tardive dyskinesia.”

Second-generation antipsychotics to consider include risperidone (0.5 mg to start, building up to 102 mg at bedtime); olanzapine (2.5 mg to start, building up to 5-10 mg at bedtime); aripiprazole (2-5 mg to start, building up to 10-15 mg a day), and quetiapine (12.5 mg to start, building up to 200 mg at bedtime).

For all medical therapy she recommends starting patients with a low dose, increasing by 0.5 mg every 2-3 weeks, and let them be “stable and comfortable” for 3-4 months, and then taper down the dose by 0.5 mg every 2-4 weeks or more slowly. In the medical chart, Dr. Murase recommends avoiding use of the terms “psychosis” and “delusions.” Instead, “formication” (tactile hallucination of insects crawling on or within the skin) or “cutaneous dysesthesia” are better terms if patients access their records, she said.

Dr. Murase reported having no relevant disclosures.

SAN DIEGO — In the clinical opinion of Jenny E. Murase, MD, caring for patients with delusional infestation — the conviction that one is infested by animate or inanimate pathogens without medical or microbiological evidence of a true infestation — puts a dermatologist’s communication skills to the ultimate test.

“The fact that delusional infestation is a fixed, false belief [means] we will never agree with patients on the etiology by definition,” Dr. Murase, a dermatologist with the Palo Alto Foundation Medical Group, Mountain View, California, said at the annual meeting of the American Academy of Dermatology. “But somehow, we must come to some kind of an agreement on how to approach this therapeutically.”

Patients with delusional infestation (DI) often describe a cutaneous sensation of itching or crawling, biting, stinging — a pins and needles sensation. “Formication is when there’s a crawling sensation on the surface of the skin,” she said. “That’s something we can agree on — the fact that there is a shared understanding that they’re experiencing some kind of sensation in their skin.”

First described in 1894, several different terms have been used to describe DI in the past, including acarophobia, delusions of parasitosis, Ekbom syndrome, and Morgellons disease. The current term used for DI includes other animate or inanimate pathogens besides parasites.

The average dermatologist manages two to three patients with DI every 5 years, “so it’s not uncommon,” said Dr. Murase, who also holds a faculty position in the department of dermatology at the University of California, San Francisco. Females are about 2.5 times more likely to be affected compared with males, she said, and 8%-12% of patients with DI have a friend or relative who shares the symptom, and they often accompany them to the office visit. “Initially, you’re trying to determine if this a primary condition where it’s only the cutaneous condition the patient is experiencing, or if there is a secondary condition like an underlying psychiatric disorder or medical condition or drug use that contributes to the sensation,” she said.

According to a descriptive study of 115 patients with DI, 50% had at least one drug detected in hair samples, and nearly 60% had evidence of some cognitive impairment that could not be explained by deficits in IQ. Another study of 147 patients with DI seen at the Mayo Clinic between 2001 and 2007 found that 81% had a prior psychiatric condition and 26% had a shared psychotic disorder.
 

Phased Approach to Treatment

Dr. Murase discussed her phased approach to caring for patients with DI, based on a review article that she and colleagues published in the International Journal of Dermatology. Phase 1 involves preparing for the visit by asking staff to refer to patients with DI as VIPs and allowing them to talk freely about the sensation they’re experiencing. “The goal is to improve the patient’s condition, not to convince the patient that he or she is delusional,” Dr. Murase explained. “Many patients can’t distinguish between when they’re talking to the doctor and when they’re talking to a nurse or a nurse practitioner; they like to feel that they’re being heard and listened to.”

She also recommends scheduling patients with DI for the end of the day and arranging frequent follow-up visits. “Making them feel valued is the bottom line,” she emphasized. “Remember: They’re less likely to respect socially defined boundaries like time constraints, so you do have to set boundaries, and don’t take what they may say to you personally. You’re not going to be able to care for that individual unless you do that. They may appear defiant, frustrated, and angry, but the fact that they showed up in your office means that you can help that person.”

Phase 2 of care for these patients consists of building a therapeutic rapport by greeting them with a smile and positive attitude and using welcoming body language such as sitting side-by-side during the office visit as opposed to face-to-face, “so it’s a less aggressive approach,” she said. Next, ask about their goal with a question such as, “Is it more important for you to find the bug/virus or to improve your condition?”

During the visit, “you’re continually shifting from etiology — which they are desperate to understand — to a shared desire for treatment,” Dr. Murase said. “No one knows what causes DI and remember, in medicine we treat patients when the exact etiology is unknown. So, we’re not doing anything that differently. Focus on the effect that the symptoms are having on their life. Say something like, ‘it must be so miserable to be living this way. I really want to help you.’ ”

Phase 3 of care for patients with DI involves performing a thorough history and physical exam. The initial office visit should include a full body exam to rule out any underlying dermatologic condition that may be causing the sensation they’re complaining about. She cited a retrospective study of 108 patients who presented to the Mayo Clinic with DI as the main reason for their office visit. Of the 80 patients who had a biopsy, 61% had chronic dermatitis; 48% had excoriation, ulceration, or erosion; and 31% had nonspecific dermal inflammation.

Whether to perform a biopsy or not is controversial, Dr. Murase added, because it’s probably not going to change the clinical impression or diagnosis. “If you agree to do the biopsy, get a verbal contract with the patient,” she advised. “You might say, ‘We’re going to do this. You’re going to choose the site, we’re going to do a biopsy, but we are going to be in agreement here that, if we can’t find the etiology, that you will still be open to going on therapy.’ This is important because it establishes a therapeutic alliance.”

Since patients with DI often bring in their own specimens, she also recommends providing them with microscope glass slides without cover slips and asking them to use clear tape, not tape that is opaque or matted, to cover the specimen.

To rule out other illnesses and conditions that could be triggering the perceived DI, she said lab tests to consider include a complete blood count, comprehensive metabolic panel, thyroid-stimulating hormone, calcium, hemoglobin A1c, vitamin B12, urinalysis, toxicology screen, HIV/hepatitis C, and rapid plasma reagin.
 

Starting Treatment

Phase 4 of care for patients with DI involves initiating therapy, which includes demonstrating empathy by reflecting on the detrimental effects of the patient’s reported sensations on their quality of life. “Emphasize that you are not questioning their experience, and that you don’t doubt that they feel things on their skin,” Dr. Murase said. “Recommend medications on an empirical or ‘trial and error’ pragmatic basis. I often tell patients, ‘I will never give up on you if you will never give up on me.’”

For treating patients with DI, her first-generation antipsychotic of choice is pimozide. She starts at a dose of 0.5 mg, building up to 2-3 mg once a day. Haloperidol is another option: 0.5 mg to start, building up to 1-5 mg every night at bedtime. “This requires monitoring for bone suppression via CBC and hypermetabolic complications via fasting lipids and HbA1c,” she said. “There is also an increased risk of prolonged QT with pimozide and risk of extrapyramidal symptoms and tardive dyskinesia.”

Second-generation antipsychotics to consider include risperidone (0.5 mg to start, building up to 102 mg at bedtime); olanzapine (2.5 mg to start, building up to 5-10 mg at bedtime); aripiprazole (2-5 mg to start, building up to 10-15 mg a day), and quetiapine (12.5 mg to start, building up to 200 mg at bedtime).

For all medical therapy she recommends starting patients with a low dose, increasing by 0.5 mg every 2-3 weeks, and let them be “stable and comfortable” for 3-4 months, and then taper down the dose by 0.5 mg every 2-4 weeks or more slowly. In the medical chart, Dr. Murase recommends avoiding use of the terms “psychosis” and “delusions.” Instead, “formication” (tactile hallucination of insects crawling on or within the skin) or “cutaneous dysesthesia” are better terms if patients access their records, she said.

Dr. Murase reported having no relevant disclosures.

CHEST

Critical Care Network

Nonrespiratory Critical Care Section

In patients with decompensated cirrhosis, there are multiple intrahepatic and extrahepatic factors contributing to hemodynamic alterations at baseline, including endothelial cell dysfunction, hepatic stellate cell activation promoting increase in vasoconstrictors, decrease in vasodilators, and angiogenesis leading to worsening of portal hypertension. Increased resistance to hepatic blood flow leads to increased production of nitric oxide and other vasodilators leading to splanchnic vasodilation, decreased effective blood volume, activation of the renin angiotensin system, sodium, and water retention. In addition to portal hypertension and splanchnic vasodilation, there is a decrease in systemic vascular resistance and hyperdynamic circulation with increased cardiac output. As cirrhosis progresses to the decompensated stage, patients may develop cirrhotic cardiomyopathy, characterized by impaired cardiac response to stress, manifesting as systolic and diastolic dysfunction, and electrophysiological abnormalities such as QT prolongation leading to hypotension and dysregulated response to fluid resuscitation.

CHEST

Early recognition of septic shock in these patients can be challenging when using traditional criteria due to their baseline hypotension, tachycardia, systemic vasodilation, and propensity for volume overload with fluid resuscitation. Elevated lactate levels in acutely ill patients are an independent risk factor for mortality in patients with cirrhosis. However, lactate levels >2mmol/L need not necessarily define sepsis in these patients, as these patients have decreased lactate clearance. Understanding the intricate interplay between the cardiac pump, vascular tone, and afterload is essential in managing shock in these individuals. Aggressive volume resuscitation may not be well tolerated, emphasizing the need for frequent hemodynamic assessments and prompt initiation of vasopressors when indicated.

CHEST

Critical Care Network

Nonrespiratory Critical Care Section

In patients with decompensated cirrhosis, there are multiple intrahepatic and extrahepatic factors contributing to hemodynamic alterations at baseline, including endothelial cell dysfunction, hepatic stellate cell activation promoting increase in vasoconstrictors, decrease in vasodilators, and angiogenesis leading to worsening of portal hypertension. Increased resistance to hepatic blood flow leads to increased production of nitric oxide and other vasodilators leading to splanchnic vasodilation, decreased effective blood volume, activation of the renin angiotensin system, sodium, and water retention. In addition to portal hypertension and splanchnic vasodilation, there is a decrease in systemic vascular resistance and hyperdynamic circulation with increased cardiac output. As cirrhosis progresses to the decompensated stage, patients may develop cirrhotic cardiomyopathy, characterized by impaired cardiac response to stress, manifesting as systolic and diastolic dysfunction, and electrophysiological abnormalities such as QT prolongation leading to hypotension and dysregulated response to fluid resuscitation.

CHEST

Early recognition of septic shock in these patients can be challenging when using traditional criteria due to their baseline hypotension, tachycardia, systemic vasodilation, and propensity for volume overload with fluid resuscitation. Elevated lactate levels in acutely ill patients are an independent risk factor for mortality in patients with cirrhosis. However, lactate levels >2mmol/L need not necessarily define sepsis in these patients, as these patients have decreased lactate clearance. Understanding the intricate interplay between the cardiac pump, vascular tone, and afterload is essential in managing shock in these individuals. Aggressive volume resuscitation may not be well tolerated, emphasizing the need for frequent hemodynamic assessments and prompt initiation of vasopressors when indicated.

CHEST

Critical Care Network

Nonrespiratory Critical Care Section

In patients with decompensated cirrhosis, there are multiple intrahepatic and extrahepatic factors contributing to hemodynamic alterations at baseline, including endothelial cell dysfunction, hepatic stellate cell activation promoting increase in vasoconstrictors, decrease in vasodilators, and angiogenesis leading to worsening of portal hypertension. Increased resistance to hepatic blood flow leads to increased production of nitric oxide and other vasodilators leading to splanchnic vasodilation, decreased effective blood volume, activation of the renin angiotensin system, sodium, and water retention. In addition to portal hypertension and splanchnic vasodilation, there is a decrease in systemic vascular resistance and hyperdynamic circulation with increased cardiac output. As cirrhosis progresses to the decompensated stage, patients may develop cirrhotic cardiomyopathy, characterized by impaired cardiac response to stress, manifesting as systolic and diastolic dysfunction, and electrophysiological abnormalities such as QT prolongation leading to hypotension and dysregulated response to fluid resuscitation.

CHEST

Early recognition of septic shock in these patients can be challenging when using traditional criteria due to their baseline hypotension, tachycardia, systemic vasodilation, and propensity for volume overload with fluid resuscitation. Elevated lactate levels in acutely ill patients are an independent risk factor for mortality in patients with cirrhosis. However, lactate levels >2mmol/L need not necessarily define sepsis in these patients, as these patients have decreased lactate clearance. Understanding the intricate interplay between the cardiac pump, vascular tone, and afterload is essential in managing shock in these individuals. Aggressive volume resuscitation may not be well tolerated, emphasizing the need for frequent hemodynamic assessments and prompt initiation of vasopressors when indicated.

Diffuse Lung Disease and Lung Transplant Network

Lung Transplant Section

Chronic lung allograft dysfunction (CLAD) remains the leading cause of morbidity and mortality in lung transplant recipients (LTRs), accounting for around 40% of deaths.¹ LTRs are typically maintained on a three-drug immunosuppressive regimen—a calcineurin inhibitor, antimetabolite agent, and corticosteroid—in order to prevent rejection. Strong randomized controlled trial-generated evidence guiding the choice of immunosuppressive therapy for LTRs is generally lacking.

CHEST

A recent large, multicentered, randomized controlled trial in Scandinavia compared outcomes between once daily extended-release tacrolimus and twice daily cyclosporin.² The target trough for cyclosporin was 250 to 300 ng/mL (0 to 3 months), 200 to 250 ng/mL (3 to 6 months), 150 to 200 ng/mL (6 to 12 months), and 100 to 150 ng/mL beyond 12 months. The trough target for tacrolimus was 10 to 14 ng/mL (0 to 3 months), 8 to 12 ng/mL (3 to 6 months), 8 to 10 ng/mL (6 to 12 months), and 6 to 8 ng/mL beyond 12 months.

CHEST

The study demonstrated that immunosuppressive regimens containing tacrolimus significantly reduced incidence of CLAD diagnosis at 36 months. The cumulative incidence of CLAD was 39% in the cyclosporin group vs 13% in the tacrolimus group (P < .0001), and the number needed to treat was 3.9 patients to prevent one case of CLAD with tacrolimus. While mortality was not significantly different between the two treatment groups in the intention to treat models, tacrolimus had a mortality benefit in the per protocol analysis.

While there is no consensus guideline recommending a first-line immunosuppression regimen following lung transplantation, the lung transplant steering committee believes that additional trials comparing existing agents are of critical importance to reduce CLAD incidence and improve long-term outcomes in LTRs.

References

1. Verleden GM, et al. J Heart Lung Transplant. 2019;38(5):493-503.

2. Dellgren G, et al. Lancet Respir Med. 2024;12(1):34-44.

Diffuse Lung Disease and Lung Transplant Network

Lung Transplant Section

Chronic lung allograft dysfunction (CLAD) remains the leading cause of morbidity and mortality in lung transplant recipients (LTRs), accounting for around 40% of deaths.¹ LTRs are typically maintained on a three-drug immunosuppressive regimen—a calcineurin inhibitor, antimetabolite agent, and corticosteroid—in order to prevent rejection. Strong randomized controlled trial-generated evidence guiding the choice of immunosuppressive therapy for LTRs is generally lacking.

CHEST

A recent large, multicentered, randomized controlled trial in Scandinavia compared outcomes between once daily extended-release tacrolimus and twice daily cyclosporin.² The target trough for cyclosporin was 250 to 300 ng/mL (0 to 3 months), 200 to 250 ng/mL (3 to 6 months), 150 to 200 ng/mL (6 to 12 months), and 100 to 150 ng/mL beyond 12 months. The trough target for tacrolimus was 10 to 14 ng/mL (0 to 3 months), 8 to 12 ng/mL (3 to 6 months), 8 to 10 ng/mL (6 to 12 months), and 6 to 8 ng/mL beyond 12 months.

CHEST

The study demonstrated that immunosuppressive regimens containing tacrolimus significantly reduced incidence of CLAD diagnosis at 36 months. The cumulative incidence of CLAD was 39% in the cyclosporin group vs 13% in the tacrolimus group (P < .0001), and the number needed to treat was 3.9 patients to prevent one case of CLAD with tacrolimus. While mortality was not significantly different between the two treatment groups in the intention to treat models, tacrolimus had a mortality benefit in the per protocol analysis.

While there is no consensus guideline recommending a first-line immunosuppression regimen following lung transplantation, the lung transplant steering committee believes that additional trials comparing existing agents are of critical importance to reduce CLAD incidence and improve long-term outcomes in LTRs.

References

1. Verleden GM, et al. J Heart Lung Transplant. 2019;38(5):493-503.

2. Dellgren G, et al. Lancet Respir Med. 2024;12(1):34-44.

Diffuse Lung Disease and Lung Transplant Network

Lung Transplant Section

Chronic lung allograft dysfunction (CLAD) remains the leading cause of morbidity and mortality in lung transplant recipients (LTRs), accounting for around 40% of deaths.¹ LTRs are typically maintained on a three-drug immunosuppressive regimen—a calcineurin inhibitor, antimetabolite agent, and corticosteroid—in order to prevent rejection. Strong randomized controlled trial-generated evidence guiding the choice of immunosuppressive therapy for LTRs is generally lacking.

CHEST

A recent large, multicentered, randomized controlled trial in Scandinavia compared outcomes between once daily extended-release tacrolimus and twice daily cyclosporin.² The target trough for cyclosporin was 250 to 300 ng/mL (0 to 3 months), 200 to 250 ng/mL (3 to 6 months), 150 to 200 ng/mL (6 to 12 months), and 100 to 150 ng/mL beyond 12 months. The trough target for tacrolimus was 10 to 14 ng/mL (0 to 3 months), 8 to 12 ng/mL (3 to 6 months), 8 to 10 ng/mL (6 to 12 months), and 6 to 8 ng/mL beyond 12 months.

CHEST

The study demonstrated that immunosuppressive regimens containing tacrolimus significantly reduced incidence of CLAD diagnosis at 36 months. The cumulative incidence of CLAD was 39% in the cyclosporin group vs 13% in the tacrolimus group (P < .0001), and the number needed to treat was 3.9 patients to prevent one case of CLAD with tacrolimus. While mortality was not significantly different between the two treatment groups in the intention to treat models, tacrolimus had a mortality benefit in the per protocol analysis.

While there is no consensus guideline recommending a first-line immunosuppression regimen following lung transplantation, the lung transplant steering committee believes that additional trials comparing existing agents are of critical importance to reduce CLAD incidence and improve long-term outcomes in LTRs.

References

1. Verleden GM, et al. J Heart Lung Transplant. 2019;38(5):493-503.

2. Dellgren G, et al. Lancet Respir Med. 2024;12(1):34-44.

CHEST

CHEST

Airways Disorders Network

Bronchiectasis Section

Bronchiectasis patients have dilated airways that are often colonized with bacteria, resulting in a vicious cycle of airway inflammation and progressive dilation. Pseudomonas aeruginosa is a frequent airway colonizer and is associated with increased morbidity and mortality in cystic fibrosis (CF) and noncystic fibrosis bronchiectasis (NCFB).¹

Both CF and NCFB guidelines recommend eradication of P. aeruginosa upon detection.² In CF, the guidelines suggest use of inhaled tobramycin, without systemic antibiotics.³ Optimal NCFB eradication regimens remain unknown, though recent studies demonstrated inhaled tobramycin is safe and effective for chronic P. aeruginosa infections in NCFB.⁴

The 2024 meta-analysis by Conceiçã et al. revealed that P. aeruginosa eradication endures more than 12 months in only 40% of NCFB cases, but that patients who received combined therapy—both systemic and inhaled therapies—had a higher eradication rate at 48% compared with 27% in those receiving only systemic antibiotics.⁵ They found that successful eradication reduced exacerbation rate by 0.91 exacerbations per year without changing hospitalization rate. They were unable to comment on optimal antibiotic selection or duration.

A take-home point from Conceiçã et al. suggests trying to eradicate P. aeruginosa with combined systemic and inhaled antibiotics if possible, but other clinical questions remain around initial antibiotic selection and how to treat persistent P. aeruginosa.

References

1. Finch, et al. Ann Am Thorac Soc. 2015;12(11):1602-1611.

2. Polverino, et al. Eur Respir J. 2017;50:1700629.

3. Mogayzel, et al. Ann ATS. 2014;11(10):1511-1761.

4. Guan, et al. CHEST. 2023;163(1):64-76.

5. Conceiçã, et al. Eur Respir Rev. 2024;33:230178.

CHEST

CHEST

Airways Disorders Network

Bronchiectasis Section

Bronchiectasis patients have dilated airways that are often colonized with bacteria, resulting in a vicious cycle of airway inflammation and progressive dilation. Pseudomonas aeruginosa is a frequent airway colonizer and is associated with increased morbidity and mortality in cystic fibrosis (CF) and noncystic fibrosis bronchiectasis (NCFB).¹

Both CF and NCFB guidelines recommend eradication of P. aeruginosa upon detection.² In CF, the guidelines suggest use of inhaled tobramycin, without systemic antibiotics.³ Optimal NCFB eradication regimens remain unknown, though recent studies demonstrated inhaled tobramycin is safe and effective for chronic P. aeruginosa infections in NCFB.⁴

The 2024 meta-analysis by Conceiçã et al. revealed that P. aeruginosa eradication endures more than 12 months in only 40% of NCFB cases, but that patients who received combined therapy—both systemic and inhaled therapies—had a higher eradication rate at 48% compared with 27% in those receiving only systemic antibiotics.⁵ They found that successful eradication reduced exacerbation rate by 0.91 exacerbations per year without changing hospitalization rate. They were unable to comment on optimal antibiotic selection or duration.

A take-home point from Conceiçã et al. suggests trying to eradicate P. aeruginosa with combined systemic and inhaled antibiotics if possible, but other clinical questions remain around initial antibiotic selection and how to treat persistent P. aeruginosa.

References

1. Finch, et al. Ann Am Thorac Soc. 2015;12(11):1602-1611.

2. Polverino, et al. Eur Respir J. 2017;50:1700629.

3. Mogayzel, et al. Ann ATS. 2014;11(10):1511-1761.

4. Guan, et al. CHEST. 2023;163(1):64-76.

5. Conceiçã, et al. Eur Respir Rev. 2024;33:230178.

CHEST

CHEST

Airways Disorders Network

Bronchiectasis Section

Bronchiectasis patients have dilated airways that are often colonized with bacteria, resulting in a vicious cycle of airway inflammation and progressive dilation. Pseudomonas aeruginosa is a frequent airway colonizer and is associated with increased morbidity and mortality in cystic fibrosis (CF) and noncystic fibrosis bronchiectasis (NCFB).¹

Both CF and NCFB guidelines recommend eradication of P. aeruginosa upon detection.² In CF, the guidelines suggest use of inhaled tobramycin, without systemic antibiotics.³ Optimal NCFB eradication regimens remain unknown, though recent studies demonstrated inhaled tobramycin is safe and effective for chronic P. aeruginosa infections in NCFB.⁴

The 2024 meta-analysis by Conceiçã et al. revealed that P. aeruginosa eradication endures more than 12 months in only 40% of NCFB cases, but that patients who received combined therapy—both systemic and inhaled therapies—had a higher eradication rate at 48% compared with 27% in those receiving only systemic antibiotics.⁵ They found that successful eradication reduced exacerbation rate by 0.91 exacerbations per year without changing hospitalization rate. They were unable to comment on optimal antibiotic selection or duration.

A take-home point from Conceiçã et al. suggests trying to eradicate P. aeruginosa with combined systemic and inhaled antibiotics if possible, but other clinical questions remain around initial antibiotic selection and how to treat persistent P. aeruginosa.

References

1. Finch, et al. Ann Am Thorac Soc. 2015;12(11):1602-1611.

2. Polverino, et al. Eur Respir J. 2017;50:1700629.

3. Mogayzel, et al. Ann ATS. 2014;11(10):1511-1761.

4. Guan, et al. CHEST. 2023;163(1):64-76.

5. Conceiçã, et al. Eur Respir Rev. 2024;33:230178.

TOPLINE:

A review of 22 articles found a higher incidence of “altered skin sensations” and alopecia in individuals receiving oral semaglutide than in those receiving placebo.

METHODOLOGY:

• The Food and Drug Administration’s  has not received reports of semaglutide-related safety events, and few studies have characterized skin findings associated with oral or subcutaneous semaglutide, a glucagon-like peptide 1 agonist used to treat obesity and type 2 diabetes.
• In this scoping review, researchers included 22 articles (15 clinical trials, six case reports, and one retrospective cohort study), published through January 2024, of patients receiving either semaglutide or a placebo or comparator, which included reports of semaglutide-associated adverse dermatologic events in 255 participants.

TAKEAWAY:

• Patients who received 50 mg oral semaglutide weekly reported a higher incidence of altered skin sensations, such as dysesthesia (1.8% vs 0%), hyperesthesia (1.2% vs 0%), skin pain (2.4% vs 0%), paresthesia (2.7% vs 0%), and sensitive skin (2.7% vs 0%), than those receiving placebo or comparator.
• Reports of alopecia (6.9% vs 0.3%) were higher in patients who received 50 mg oral semaglutide weekly than in those on placebo, but only 0.2% of patients on 2.4 mg of subcutaneous semaglutide reported alopecia vs 0.5% of those on placebo.
• Unspecified dermatologic reactions (4.1% vs 1.5%) were reported in more patients on subcutaneous semaglutide than those on a placebo or comparator. Several case reports described isolated cases of severe skin-related adverse effects, such as bullous pemphigoid, eosinophilic fasciitis, and leukocytoclastic vasculitis.
• On the contrary, injection site reactions (3.5% vs 6.7%) were less common in patients on subcutaneous semaglutide compared with in those on a placebo or comparator.

IN PRACTICE:

“Variations in dosage and administration routes could influence the types and severity of skin findings, underscoring the need for additional research,” the authors wrote.

SOURCE:

Megan M. Tran, BS, from the Warren Alpert Medical School, Brown University, Providence, Rhode Island, led this study, which was published online in the Journal of the American Academy of Dermatology.

LIMITATIONS:

This study could not adjust for confounding factors and could not establish a direct causal association between semaglutide and the adverse reactions reported.

DISCLOSURES:

This study did not report any funding sources. The authors declared no conflicts of interest.

A version of this article appeared on Medscape.com.

TOPLINE:

A review of 22 articles found a higher incidence of “altered skin sensations” and alopecia in individuals receiving oral semaglutide than in those receiving placebo.

METHODOLOGY:

• The Food and Drug Administration’s  has not received reports of semaglutide-related safety events, and few studies have characterized skin findings associated with oral or subcutaneous semaglutide, a glucagon-like peptide 1 agonist used to treat obesity and type 2 diabetes.
• In this scoping review, researchers included 22 articles (15 clinical trials, six case reports, and one retrospective cohort study), published through January 2024, of patients receiving either semaglutide or a placebo or comparator, which included reports of semaglutide-associated adverse dermatologic events in 255 participants.

TAKEAWAY:

• Patients who received 50 mg oral semaglutide weekly reported a higher incidence of altered skin sensations, such as dysesthesia (1.8% vs 0%), hyperesthesia (1.2% vs 0%), skin pain (2.4% vs 0%), paresthesia (2.7% vs 0%), and sensitive skin (2.7% vs 0%), than those receiving placebo or comparator.
• Reports of alopecia (6.9% vs 0.3%) were higher in patients who received 50 mg oral semaglutide weekly than in those on placebo, but only 0.2% of patients on 2.4 mg of subcutaneous semaglutide reported alopecia vs 0.5% of those on placebo.
• Unspecified dermatologic reactions (4.1% vs 1.5%) were reported in more patients on subcutaneous semaglutide than those on a placebo or comparator. Several case reports described isolated cases of severe skin-related adverse effects, such as bullous pemphigoid, eosinophilic fasciitis, and leukocytoclastic vasculitis.
• On the contrary, injection site reactions (3.5% vs 6.7%) were less common in patients on subcutaneous semaglutide compared with in those on a placebo or comparator.

IN PRACTICE:

“Variations in dosage and administration routes could influence the types and severity of skin findings, underscoring the need for additional research,” the authors wrote.

SOURCE:

Megan M. Tran, BS, from the Warren Alpert Medical School, Brown University, Providence, Rhode Island, led this study, which was published online in the Journal of the American Academy of Dermatology.

LIMITATIONS:

This study could not adjust for confounding factors and could not establish a direct causal association between semaglutide and the adverse reactions reported.

DISCLOSURES:

This study did not report any funding sources. The authors declared no conflicts of interest.

A version of this article appeared on Medscape.com.

TOPLINE:

A review of 22 articles found a higher incidence of “altered skin sensations” and alopecia in individuals receiving oral semaglutide than in those receiving placebo.

METHODOLOGY:

• The Food and Drug Administration’s  has not received reports of semaglutide-related safety events, and few studies have characterized skin findings associated with oral or subcutaneous semaglutide, a glucagon-like peptide 1 agonist used to treat obesity and type 2 diabetes.
• In this scoping review, researchers included 22 articles (15 clinical trials, six case reports, and one retrospective cohort study), published through January 2024, of patients receiving either semaglutide or a placebo or comparator, which included reports of semaglutide-associated adverse dermatologic events in 255 participants.

TAKEAWAY:

• Patients who received 50 mg oral semaglutide weekly reported a higher incidence of altered skin sensations, such as dysesthesia (1.8% vs 0%), hyperesthesia (1.2% vs 0%), skin pain (2.4% vs 0%), paresthesia (2.7% vs 0%), and sensitive skin (2.7% vs 0%), than those receiving placebo or comparator.
• Reports of alopecia (6.9% vs 0.3%) were higher in patients who received 50 mg oral semaglutide weekly than in those on placebo, but only 0.2% of patients on 2.4 mg of subcutaneous semaglutide reported alopecia vs 0.5% of those on placebo.
• Unspecified dermatologic reactions (4.1% vs 1.5%) were reported in more patients on subcutaneous semaglutide than those on a placebo or comparator. Several case reports described isolated cases of severe skin-related adverse effects, such as bullous pemphigoid, eosinophilic fasciitis, and leukocytoclastic vasculitis.
• On the contrary, injection site reactions (3.5% vs 6.7%) were less common in patients on subcutaneous semaglutide compared with in those on a placebo or comparator.

IN PRACTICE:

“Variations in dosage and administration routes could influence the types and severity of skin findings, underscoring the need for additional research,” the authors wrote.

SOURCE:

Megan M. Tran, BS, from the Warren Alpert Medical School, Brown University, Providence, Rhode Island, led this study, which was published online in the Journal of the American Academy of Dermatology.

LIMITATIONS:

This study could not adjust for confounding factors and could not establish a direct causal association between semaglutide and the adverse reactions reported.

DISCLOSURES:

This study did not report any funding sources. The authors declared no conflicts of interest.

A version of this article appeared on Medscape.com.