Breast Cancer

Breast cancer has a worse prognosis when diagnosed during pregnancy or postpartum. Methods for early detection are needed, as evidenced every day in the multidisciplinary unit for treating pregnancy-associated breast cancer, which operates within the breast unit at the Vall d’Hebron University Hospital in Barcelona.

The team working in this field is led by Cristina Saura, PhD, who is also head of the Breast Cancer Group at the Vall d’Hebron Institute of Oncology (VHIO). The results of a study recently published in Cancer Discovery show, for the first time, that breast milk from breast cancer patients contains circulating tumor DNA that can be detected by a liquid biopsy of the milk.

Dr. Saura explained in an interview why they began to pursue this research, which, in one sense, fell into their laps. “In this case, it arose from the concerns of a breast cancer patient who was diagnosed while pregnant with her third daughter. She was actually the one who came up with the idea for the project. She was worried that she had transmitted the tumor through her breast milk to her second daughter while breastfeeding. She had been breastfeeding for a long time and had stretched it out until shortly before she was diagnosed with breast cancer. So she brought us a sample of breast milk that she had stored in her freezer.

“So, thanks to her, that’s where our project started. Though we knew that breast cancer is not transmitted through breast milk, we decided to test the sample and look for markers that could help our research. In the end, when we analyzed the patient’s breast milk, we found DNA with the same mutation that was present in her tumor,” explained Dr. Saura. She noted that the breast milk they analyzed had been frozen for more than a year before the patient’s cancer diagnosis.

In terms of methodology, Ana Vivancos, PhD, head of the VHIO cancer genomics group and also one of the authors of the study, explained that they used two techniques to analyze the breast milk and blood samples: next-generation sequencing and droplet digital polymerase chain reaction. These methods confirmed the presence of ctDNA in the breast milk.
 

High-sensitivity genomic panel

“We were able to detect tumor mutations in milk samples from 13 of the 15 patients with breast cancer who were tested, while circulating tumor DNA was detected in only one of all the blood samples that were collected at the same time,” said Dr. Vivancos. “The samples from the two patients for whom no mutation was detected were discovered to be colostrum that had been collected during the first few hours of lactation.”

As a next step to make this finding practically useful, the research team designed a genomic panel using next-generation sequencing as a potential method for early detection of breast cancer. “We’ve developed a panel that uses hybrid capture chemistry and unique molecular identifiers that ensure better sensitivity during next-generation sequencing. The panel has been calibrated, based on the existing literature, to detect the genes that are most frequently mutated in breast cancer in young women under 45 years old.”

According to Dr. Vivancos, the sensitivity of this panel exceeds 70%. This means that for all the patient samples analyzed using this panel, 7 out of 10 cases are detected with 100% specificity.

“In practice, the panel design allows us to detect mutations in more than 95% of breast cancer cases in women under 45 years old. Therefore, using this panel for early detection of this type of tumor during lactation should contribute to addressing a medical need that, until today, has gone unmet,” noted Dr. Vivancos.

As for this unresolved need, Dr. Saura explained that there is currently no system or tool available to allow early suspicion of breast tumors in pregnant women prior to diagnosis. “That’s exactly the goal of this research: to screen for breast cancer in women who have just given birth. Now, it needs to be validated in a larger group of women in a clinical trial.”
 

More direct contact with tumor cells

In Dr. Saura’s opinion, in Spain, just like taking a small blood sample from newborns in a heel-prick test to rule out metabolic diseases, milk samples could be taken from women who give birth to rule out or diagnose breast cancer.

As to the potential advantages that breast milk liquid biopsy could have over similar techniques like blood liquid biopsy, Dr. Vivancos pointed to the results of her study: “We have seen that breast milk liquid biopsy was positive for the presence of circulating tumor DNA in 87% of cases, whereas blood only revealed the presence of this marker in 8% of cases. This difference indicates that breast milk is a biofluid that is in more direct contact with tumor cells and therefore will be more informative in earlier stages.”

Dr. Saura explained that the data does not lie when it comes to these tumors in pregnant or postpartum women. “In general, they tend to have a worse prognosis because, in most cases, they are diagnosed in advanced stages. Furthermore, it is typically assumed that the physiological changes in the breasts during gestation and lactation, which are considered to be normal, may hide a developing tumor. The fact is that postpartum breast cancer, understood to be the 10 years after delivery, accounts for 40%-45% of breast cancer cases diagnosed before age 45.”

The researchers plan to continue this project. “Our next step to confirm the usefulness of breast milk as a new tool for liquid biopsy for early detection of breast cancer during the postpartum period is to perform this noninvasive test in thousands of women,” said Dr. Saura.
 

Goal: Standardize the test as a screening method

“Based on the results we’ve published, we’re starting a study aimed at collecting breast milk samples from 5,000 healthy women around the world who became pregnant at age 40 or older, or who got pregnant at any age and carry mutations that increase their risk of breast cancer,” Dr. Saura added.

When asked when they expect to have preliminary results from this new study, Dr. Saura stated that it’s not yet possible to say exactly when. “We’re still waiting for funding to continue this project, but we continue performing analyses on a case-by-case basis. Of course, if we detect any abnormalities in these women, we will follow the established protocol to confirm diagnosis and start treatment if necessary.”

When asked whether it is reasonable to expect breast milk liquid biopsy to become normalized as a screening method for women of childbearing age who have a history or risk factors for developing breast cancer, Dr. Vivancos said, “That’s the scenario we see in the future and what we wish to contribute toward by providing scientific evidence to make it a reality.”

“For now, our goal is to validate whether circulating tumor DNA can be detected by breast milk liquid biopsy even before breast cancer can be diagnosed using conventional imaging techniques. If we can validate these preliminary results, we will be able to detect breast cancer early using a noninvasive test like breast milk liquid biopsy,” explained Saura.

Lastly, and in view of the issues that are still unresolved when it comes to the detection and treatment of breast cancer during pregnancy, Dr. Saura highlighted the emotional impact that a diagnosis of pregnancy-related cancer has on women and on those close to them. “But the first thing they need to know is that diagnosis is not necessarily synonymous with termination of the pregnancy. On the contrary, this tumor can be treated during pregnancy, since surgery can be performed at any time, and chemotherapy can be started in the second trimester. Proof of this is the 72 children who have been born under these circumstances in the past 20 years at the Vall d’Hebrón University Hospital. This hospital is a pioneer in Spain thanks to its multidisciplinary program for education and specific follow-up with women who have been diagnosed with a breast tumor during pregnancy.”

Dr. Saura and Dr. Vivancos reported no relevant financial relationships.

This article was translated from the Medscape Spanish edition. A version of this article appeared on Medscape.com.

Breast cancer has a worse prognosis when diagnosed during pregnancy or postpartum. Methods for early detection are needed, as evidenced every day in the multidisciplinary unit for treating pregnancy-associated breast cancer, which operates within the breast unit at the Vall d’Hebron University Hospital in Barcelona.

The team working in this field is led by Cristina Saura, PhD, who is also head of the Breast Cancer Group at the Vall d’Hebron Institute of Oncology (VHIO). The results of a study recently published in Cancer Discovery show, for the first time, that breast milk from breast cancer patients contains circulating tumor DNA that can be detected by a liquid biopsy of the milk.

Dr. Saura explained in an interview why they began to pursue this research, which, in one sense, fell into their laps. “In this case, it arose from the concerns of a breast cancer patient who was diagnosed while pregnant with her third daughter. She was actually the one who came up with the idea for the project. She was worried that she had transmitted the tumor through her breast milk to her second daughter while breastfeeding. She had been breastfeeding for a long time and had stretched it out until shortly before she was diagnosed with breast cancer. So she brought us a sample of breast milk that she had stored in her freezer.

“So, thanks to her, that’s where our project started. Though we knew that breast cancer is not transmitted through breast milk, we decided to test the sample and look for markers that could help our research. In the end, when we analyzed the patient’s breast milk, we found DNA with the same mutation that was present in her tumor,” explained Dr. Saura. She noted that the breast milk they analyzed had been frozen for more than a year before the patient’s cancer diagnosis.

In terms of methodology, Ana Vivancos, PhD, head of the VHIO cancer genomics group and also one of the authors of the study, explained that they used two techniques to analyze the breast milk and blood samples: next-generation sequencing and droplet digital polymerase chain reaction. These methods confirmed the presence of ctDNA in the breast milk.
 

High-sensitivity genomic panel

“We were able to detect tumor mutations in milk samples from 13 of the 15 patients with breast cancer who were tested, while circulating tumor DNA was detected in only one of all the blood samples that were collected at the same time,” said Dr. Vivancos. “The samples from the two patients for whom no mutation was detected were discovered to be colostrum that had been collected during the first few hours of lactation.”

As a next step to make this finding practically useful, the research team designed a genomic panel using next-generation sequencing as a potential method for early detection of breast cancer. “We’ve developed a panel that uses hybrid capture chemistry and unique molecular identifiers that ensure better sensitivity during next-generation sequencing. The panel has been calibrated, based on the existing literature, to detect the genes that are most frequently mutated in breast cancer in young women under 45 years old.”

According to Dr. Vivancos, the sensitivity of this panel exceeds 70%. This means that for all the patient samples analyzed using this panel, 7 out of 10 cases are detected with 100% specificity.

“In practice, the panel design allows us to detect mutations in more than 95% of breast cancer cases in women under 45 years old. Therefore, using this panel for early detection of this type of tumor during lactation should contribute to addressing a medical need that, until today, has gone unmet,” noted Dr. Vivancos.

As for this unresolved need, Dr. Saura explained that there is currently no system or tool available to allow early suspicion of breast tumors in pregnant women prior to diagnosis. “That’s exactly the goal of this research: to screen for breast cancer in women who have just given birth. Now, it needs to be validated in a larger group of women in a clinical trial.”
 

More direct contact with tumor cells

In Dr. Saura’s opinion, in Spain, just like taking a small blood sample from newborns in a heel-prick test to rule out metabolic diseases, milk samples could be taken from women who give birth to rule out or diagnose breast cancer.

As to the potential advantages that breast milk liquid biopsy could have over similar techniques like blood liquid biopsy, Dr. Vivancos pointed to the results of her study: “We have seen that breast milk liquid biopsy was positive for the presence of circulating tumor DNA in 87% of cases, whereas blood only revealed the presence of this marker in 8% of cases. This difference indicates that breast milk is a biofluid that is in more direct contact with tumor cells and therefore will be more informative in earlier stages.”

Dr. Saura explained that the data does not lie when it comes to these tumors in pregnant or postpartum women. “In general, they tend to have a worse prognosis because, in most cases, they are diagnosed in advanced stages. Furthermore, it is typically assumed that the physiological changes in the breasts during gestation and lactation, which are considered to be normal, may hide a developing tumor. The fact is that postpartum breast cancer, understood to be the 10 years after delivery, accounts for 40%-45% of breast cancer cases diagnosed before age 45.”

The researchers plan to continue this project. “Our next step to confirm the usefulness of breast milk as a new tool for liquid biopsy for early detection of breast cancer during the postpartum period is to perform this noninvasive test in thousands of women,” said Dr. Saura.
 

Goal: Standardize the test as a screening method

“Based on the results we’ve published, we’re starting a study aimed at collecting breast milk samples from 5,000 healthy women around the world who became pregnant at age 40 or older, or who got pregnant at any age and carry mutations that increase their risk of breast cancer,” Dr. Saura added.

When asked when they expect to have preliminary results from this new study, Dr. Saura stated that it’s not yet possible to say exactly when. “We’re still waiting for funding to continue this project, but we continue performing analyses on a case-by-case basis. Of course, if we detect any abnormalities in these women, we will follow the established protocol to confirm diagnosis and start treatment if necessary.”

When asked whether it is reasonable to expect breast milk liquid biopsy to become normalized as a screening method for women of childbearing age who have a history or risk factors for developing breast cancer, Dr. Vivancos said, “That’s the scenario we see in the future and what we wish to contribute toward by providing scientific evidence to make it a reality.”

“For now, our goal is to validate whether circulating tumor DNA can be detected by breast milk liquid biopsy even before breast cancer can be diagnosed using conventional imaging techniques. If we can validate these preliminary results, we will be able to detect breast cancer early using a noninvasive test like breast milk liquid biopsy,” explained Saura.

Lastly, and in view of the issues that are still unresolved when it comes to the detection and treatment of breast cancer during pregnancy, Dr. Saura highlighted the emotional impact that a diagnosis of pregnancy-related cancer has on women and on those close to them. “But the first thing they need to know is that diagnosis is not necessarily synonymous with termination of the pregnancy. On the contrary, this tumor can be treated during pregnancy, since surgery can be performed at any time, and chemotherapy can be started in the second trimester. Proof of this is the 72 children who have been born under these circumstances in the past 20 years at the Vall d’Hebrón University Hospital. This hospital is a pioneer in Spain thanks to its multidisciplinary program for education and specific follow-up with women who have been diagnosed with a breast tumor during pregnancy.”

Dr. Saura and Dr. Vivancos reported no relevant financial relationships.

This article was translated from the Medscape Spanish edition. A version of this article appeared on Medscape.com.

Breast cancer has a worse prognosis when diagnosed during pregnancy or postpartum. Methods for early detection are needed, as evidenced every day in the multidisciplinary unit for treating pregnancy-associated breast cancer, which operates within the breast unit at the Vall d’Hebron University Hospital in Barcelona.

The team working in this field is led by Cristina Saura, PhD, who is also head of the Breast Cancer Group at the Vall d’Hebron Institute of Oncology (VHIO). The results of a study recently published in Cancer Discovery show, for the first time, that breast milk from breast cancer patients contains circulating tumor DNA that can be detected by a liquid biopsy of the milk.

Dr. Saura explained in an interview why they began to pursue this research, which, in one sense, fell into their laps. “In this case, it arose from the concerns of a breast cancer patient who was diagnosed while pregnant with her third daughter. She was actually the one who came up with the idea for the project. She was worried that she had transmitted the tumor through her breast milk to her second daughter while breastfeeding. She had been breastfeeding for a long time and had stretched it out until shortly before she was diagnosed with breast cancer. So she brought us a sample of breast milk that she had stored in her freezer.

“So, thanks to her, that’s where our project started. Though we knew that breast cancer is not transmitted through breast milk, we decided to test the sample and look for markers that could help our research. In the end, when we analyzed the patient’s breast milk, we found DNA with the same mutation that was present in her tumor,” explained Dr. Saura. She noted that the breast milk they analyzed had been frozen for more than a year before the patient’s cancer diagnosis.

In terms of methodology, Ana Vivancos, PhD, head of the VHIO cancer genomics group and also one of the authors of the study, explained that they used two techniques to analyze the breast milk and blood samples: next-generation sequencing and droplet digital polymerase chain reaction. These methods confirmed the presence of ctDNA in the breast milk.
 

High-sensitivity genomic panel

“We were able to detect tumor mutations in milk samples from 13 of the 15 patients with breast cancer who were tested, while circulating tumor DNA was detected in only one of all the blood samples that were collected at the same time,” said Dr. Vivancos. “The samples from the two patients for whom no mutation was detected were discovered to be colostrum that had been collected during the first few hours of lactation.”

As a next step to make this finding practically useful, the research team designed a genomic panel using next-generation sequencing as a potential method for early detection of breast cancer. “We’ve developed a panel that uses hybrid capture chemistry and unique molecular identifiers that ensure better sensitivity during next-generation sequencing. The panel has been calibrated, based on the existing literature, to detect the genes that are most frequently mutated in breast cancer in young women under 45 years old.”

According to Dr. Vivancos, the sensitivity of this panel exceeds 70%. This means that for all the patient samples analyzed using this panel, 7 out of 10 cases are detected with 100% specificity.

“In practice, the panel design allows us to detect mutations in more than 95% of breast cancer cases in women under 45 years old. Therefore, using this panel for early detection of this type of tumor during lactation should contribute to addressing a medical need that, until today, has gone unmet,” noted Dr. Vivancos.

As for this unresolved need, Dr. Saura explained that there is currently no system or tool available to allow early suspicion of breast tumors in pregnant women prior to diagnosis. “That’s exactly the goal of this research: to screen for breast cancer in women who have just given birth. Now, it needs to be validated in a larger group of women in a clinical trial.”
 

More direct contact with tumor cells

In Dr. Saura’s opinion, in Spain, just like taking a small blood sample from newborns in a heel-prick test to rule out metabolic diseases, milk samples could be taken from women who give birth to rule out or diagnose breast cancer.

As to the potential advantages that breast milk liquid biopsy could have over similar techniques like blood liquid biopsy, Dr. Vivancos pointed to the results of her study: “We have seen that breast milk liquid biopsy was positive for the presence of circulating tumor DNA in 87% of cases, whereas blood only revealed the presence of this marker in 8% of cases. This difference indicates that breast milk is a biofluid that is in more direct contact with tumor cells and therefore will be more informative in earlier stages.”

Dr. Saura explained that the data does not lie when it comes to these tumors in pregnant or postpartum women. “In general, they tend to have a worse prognosis because, in most cases, they are diagnosed in advanced stages. Furthermore, it is typically assumed that the physiological changes in the breasts during gestation and lactation, which are considered to be normal, may hide a developing tumor. The fact is that postpartum breast cancer, understood to be the 10 years after delivery, accounts for 40%-45% of breast cancer cases diagnosed before age 45.”

The researchers plan to continue this project. “Our next step to confirm the usefulness of breast milk as a new tool for liquid biopsy for early detection of breast cancer during the postpartum period is to perform this noninvasive test in thousands of women,” said Dr. Saura.
 

Goal: Standardize the test as a screening method

“Based on the results we’ve published, we’re starting a study aimed at collecting breast milk samples from 5,000 healthy women around the world who became pregnant at age 40 or older, or who got pregnant at any age and carry mutations that increase their risk of breast cancer,” Dr. Saura added.

When asked when they expect to have preliminary results from this new study, Dr. Saura stated that it’s not yet possible to say exactly when. “We’re still waiting for funding to continue this project, but we continue performing analyses on a case-by-case basis. Of course, if we detect any abnormalities in these women, we will follow the established protocol to confirm diagnosis and start treatment if necessary.”

When asked whether it is reasonable to expect breast milk liquid biopsy to become normalized as a screening method for women of childbearing age who have a history or risk factors for developing breast cancer, Dr. Vivancos said, “That’s the scenario we see in the future and what we wish to contribute toward by providing scientific evidence to make it a reality.”

“For now, our goal is to validate whether circulating tumor DNA can be detected by breast milk liquid biopsy even before breast cancer can be diagnosed using conventional imaging techniques. If we can validate these preliminary results, we will be able to detect breast cancer early using a noninvasive test like breast milk liquid biopsy,” explained Saura.

Lastly, and in view of the issues that are still unresolved when it comes to the detection and treatment of breast cancer during pregnancy, Dr. Saura highlighted the emotional impact that a diagnosis of pregnancy-related cancer has on women and on those close to them. “But the first thing they need to know is that diagnosis is not necessarily synonymous with termination of the pregnancy. On the contrary, this tumor can be treated during pregnancy, since surgery can be performed at any time, and chemotherapy can be started in the second trimester. Proof of this is the 72 children who have been born under these circumstances in the past 20 years at the Vall d’Hebrón University Hospital. This hospital is a pioneer in Spain thanks to its multidisciplinary program for education and specific follow-up with women who have been diagnosed with a breast tumor during pregnancy.”

Dr. Saura and Dr. Vivancos reported no relevant financial relationships.

This article was translated from the Medscape Spanish edition. A version of this article appeared on Medscape.com.

TOPLINE:

Overall, making comprehensive dietary changes in line with a Mediterranean diet did not reduce women’s risk for breast cancer recurrence or metastasis. However, women at high risk for recurrence who made the greatest improvements in their diet quality demonstrated a 41% lower risk for recurrence, compared with peers who made the fewest improvements.

METHODOLOGY:

• A growing body of evidence suggests that a better dietary quality may improve survival among patients with breast cancer, but whether diet impacts breast cancer–specific mortality remains controversial.
• To better understand the relationship between diet and breast cancer outcomes, investigators recruited 1,542 women with breast cancer who had undergone surgical resection in the past 5 years and were considered high risk for recurrence.
• All women received general recommendations for cancer prevention, while the intervention group received active support to adhere to a macro–Mediterranean-style diet, which encourages mainly consuming whole grains, legumes, and high-fiber vegetables and discourages eating foods high in saturated and trans fats, processed meats, and foods and beverages high in sugar.
• Diet was assessed at baseline, 1 year, and every few months in subsequent years via food frequency diaries. Compliance with dietary recommendations for the whole cohort was assessed using a dietary index developed for the trial.
• In addition to diet, women in the diet intervention group were encouraged to maintain moderate to intense physical activity – 30 minutes, on average, each day – and received pedometers to track steps, aiming for 10,000 per day.
•  

TAKEAWAY:

• Over 5 years of follow-up, the rate of breast cancer recurrence did not differ between women in the diet intervention group and those in the control group. Overall, 95 of 769 women in the intervention group and 98 of 773 in the control group had a breast cancer recurrence (hazard ratio, 0.99).
• When evaluating outcomes in the entire cohort, looking at everyone’s level of compliance with dietary recommendations, women who adhered the most to the dietary guidelines had a 41% lower recurrence risk compared with women who adhered the least (HR, 0.59).
• The greatest protective effect among women who demonstrated high compliance occurred in those with ER-positive cancers (HR, 0.42) and those with ER-positive cancers who received tamoxifen (HR, 0.30).
•  

IN PRACTICE:

This intervention trial “did not confirm the hypothesis that a comprehensive dietary modification reduces breast cancer recurrence and metastases,” but when looking at compliance to the Mediterranean diet overall, the analysis did find “a significantly better prognosis” for women with the best adherence.

SOURCE:

The study, with first author Franco Berrino, MD, PhD, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, was published online in Clinical Cancer Research. 

LIMITATIONS:

The study relied on self-reported dietary data. No dietary instrument was used to estimate nutrient intake and the dietary index developed for the trial remains unvalidated.

DISCLOSURES:

The study was supported by the Italian Department of Health, the Associazione Italiana per la Ricerca sul Cancro, and the Vita e Salute Foundation. The authors reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

TOPLINE:

Overall, making comprehensive dietary changes in line with a Mediterranean diet did not reduce women’s risk for breast cancer recurrence or metastasis. However, women at high risk for recurrence who made the greatest improvements in their diet quality demonstrated a 41% lower risk for recurrence, compared with peers who made the fewest improvements.

METHODOLOGY:

• A growing body of evidence suggests that a better dietary quality may improve survival among patients with breast cancer, but whether diet impacts breast cancer–specific mortality remains controversial.
• To better understand the relationship between diet and breast cancer outcomes, investigators recruited 1,542 women with breast cancer who had undergone surgical resection in the past 5 years and were considered high risk for recurrence.
• All women received general recommendations for cancer prevention, while the intervention group received active support to adhere to a macro–Mediterranean-style diet, which encourages mainly consuming whole grains, legumes, and high-fiber vegetables and discourages eating foods high in saturated and trans fats, processed meats, and foods and beverages high in sugar.
• Diet was assessed at baseline, 1 year, and every few months in subsequent years via food frequency diaries. Compliance with dietary recommendations for the whole cohort was assessed using a dietary index developed for the trial.
• In addition to diet, women in the diet intervention group were encouraged to maintain moderate to intense physical activity – 30 minutes, on average, each day – and received pedometers to track steps, aiming for 10,000 per day.
•  

TAKEAWAY:

• Over 5 years of follow-up, the rate of breast cancer recurrence did not differ between women in the diet intervention group and those in the control group. Overall, 95 of 769 women in the intervention group and 98 of 773 in the control group had a breast cancer recurrence (hazard ratio, 0.99).
• When evaluating outcomes in the entire cohort, looking at everyone’s level of compliance with dietary recommendations, women who adhered the most to the dietary guidelines had a 41% lower recurrence risk compared with women who adhered the least (HR, 0.59).
• The greatest protective effect among women who demonstrated high compliance occurred in those with ER-positive cancers (HR, 0.42) and those with ER-positive cancers who received tamoxifen (HR, 0.30).
•  

IN PRACTICE:

This intervention trial “did not confirm the hypothesis that a comprehensive dietary modification reduces breast cancer recurrence and metastases,” but when looking at compliance to the Mediterranean diet overall, the analysis did find “a significantly better prognosis” for women with the best adherence.

SOURCE:

The study, with first author Franco Berrino, MD, PhD, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, was published online in Clinical Cancer Research. 

LIMITATIONS:

The study relied on self-reported dietary data. No dietary instrument was used to estimate nutrient intake and the dietary index developed for the trial remains unvalidated.

DISCLOSURES:

The study was supported by the Italian Department of Health, the Associazione Italiana per la Ricerca sul Cancro, and the Vita e Salute Foundation. The authors reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

TOPLINE:

Overall, making comprehensive dietary changes in line with a Mediterranean diet did not reduce women’s risk for breast cancer recurrence or metastasis. However, women at high risk for recurrence who made the greatest improvements in their diet quality demonstrated a 41% lower risk for recurrence, compared with peers who made the fewest improvements.

METHODOLOGY:

• A growing body of evidence suggests that a better dietary quality may improve survival among patients with breast cancer, but whether diet impacts breast cancer–specific mortality remains controversial.
• To better understand the relationship between diet and breast cancer outcomes, investigators recruited 1,542 women with breast cancer who had undergone surgical resection in the past 5 years and were considered high risk for recurrence.
• All women received general recommendations for cancer prevention, while the intervention group received active support to adhere to a macro–Mediterranean-style diet, which encourages mainly consuming whole grains, legumes, and high-fiber vegetables and discourages eating foods high in saturated and trans fats, processed meats, and foods and beverages high in sugar.
• Diet was assessed at baseline, 1 year, and every few months in subsequent years via food frequency diaries. Compliance with dietary recommendations for the whole cohort was assessed using a dietary index developed for the trial.
• In addition to diet, women in the diet intervention group were encouraged to maintain moderate to intense physical activity – 30 minutes, on average, each day – and received pedometers to track steps, aiming for 10,000 per day.
•  

TAKEAWAY:

• Over 5 years of follow-up, the rate of breast cancer recurrence did not differ between women in the diet intervention group and those in the control group. Overall, 95 of 769 women in the intervention group and 98 of 773 in the control group had a breast cancer recurrence (hazard ratio, 0.99).
• When evaluating outcomes in the entire cohort, looking at everyone’s level of compliance with dietary recommendations, women who adhered the most to the dietary guidelines had a 41% lower recurrence risk compared with women who adhered the least (HR, 0.59).
• The greatest protective effect among women who demonstrated high compliance occurred in those with ER-positive cancers (HR, 0.42) and those with ER-positive cancers who received tamoxifen (HR, 0.30).
•  

IN PRACTICE:

This intervention trial “did not confirm the hypothesis that a comprehensive dietary modification reduces breast cancer recurrence and metastases,” but when looking at compliance to the Mediterranean diet overall, the analysis did find “a significantly better prognosis” for women with the best adherence.

SOURCE:

The study, with first author Franco Berrino, MD, PhD, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, was published online in Clinical Cancer Research. 

LIMITATIONS:

The study relied on self-reported dietary data. No dietary instrument was used to estimate nutrient intake and the dietary index developed for the trial remains unvalidated.

DISCLOSURES:

The study was supported by the Italian Department of Health, the Associazione Italiana per la Ricerca sul Cancro, and the Vita e Salute Foundation. The authors reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration has approved capivasertib (Truqap, AstraZeneca Pharmaceuticals) with fulvestrant for certain previously treated adults with hormone receptor (HR)–positive, human epidermal growth factor receptor (HER2)–negative, locally advanced or metastatic breast cancer.

Specifically, the first-in-class AKT kinase inhibitor approval is for patients with one or more PIK3CA/AKT1/PTEN alterations, as detected by an FDA-approved test, whose metastatic disease progressed on at least one endocrine-based regimen or who experienced recurrence on or within 12 months of completing adjuvant therapy, according to the FDA approval announcement.

Olivier Le Moal/Getty Images

The FDA also approved a companion diagnostic device, the FoundationOne CDx assay, to identify patients who are eligible for treatment with capivasertib.

Approval of capivasertib was based on findings from the randomized, placebo-controlled, phase 3 CAPItello-291 trial, which involved 708 patients with locally advanced or metastatic HR-positive, HER2-negative breast cancer, including 289 whose tumors had PIK3CA/AKT1/PTEN alterations. All had progressed on aromatase inhibitor–based treatment and may have received up to two prior lines of endocrine therapy and up to one line of chemotherapy.

Patients were randomized to either 400 mg of oral capivasertib or placebo twice daily for 4 days, followed by 3 days off treatment each week over a 28-day treatment cycle. Patients in both arms received 500 mg intramuscular fulvestrant on cycle 1 days 1 and 15, and then every 28 days thereafter. Treatment continued until disease progression or unacceptable toxicity.

In the 289 patients with PIK3CA/AKT1/PTEN–altered tumors, median progression-free survival (PFS) in the capivasertib arm was 7.3 months versus 3.1 months in the placebo group (hazard ratio, 0.50).

An exploratory analysis of PFS in the 313 (44%) patients whose tumors did not have a PIK3CA/AKT1/PTEN alteration demonstrated a less notable benefit to the combination (HR, 0.79; 95% confidence interval, 0.61-1.02), indicating that “the difference in the overall population was primarily attributed to the results seen in the population of patients whose tumors have PIK3CA/AKT1/PTEN alteration,” the FDA explained.

Adverse reactions occurring in at least 20% of patients included decreased lymphocytes, leukocytes, hemoglobin, and neutrophils; increased fasting glucose, creatinine, and triglycerides; and diarrhea, nausea, fatigue, vomiting, and stomatitis.

The recommended capivasertib dose is 400 mg orally twice daily, given about 12 hours apart with or without food, for 4 days followed by 3 off days until disease progression or unacceptable toxicity, according to the prescribing information.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration has approved capivasertib (Truqap, AstraZeneca Pharmaceuticals) with fulvestrant for certain previously treated adults with hormone receptor (HR)–positive, human epidermal growth factor receptor (HER2)–negative, locally advanced or metastatic breast cancer.

Specifically, the first-in-class AKT kinase inhibitor approval is for patients with one or more PIK3CA/AKT1/PTEN alterations, as detected by an FDA-approved test, whose metastatic disease progressed on at least one endocrine-based regimen or who experienced recurrence on or within 12 months of completing adjuvant therapy, according to the FDA approval announcement.

Olivier Le Moal/Getty Images

The FDA also approved a companion diagnostic device, the FoundationOne CDx assay, to identify patients who are eligible for treatment with capivasertib.

Approval of capivasertib was based on findings from the randomized, placebo-controlled, phase 3 CAPItello-291 trial, which involved 708 patients with locally advanced or metastatic HR-positive, HER2-negative breast cancer, including 289 whose tumors had PIK3CA/AKT1/PTEN alterations. All had progressed on aromatase inhibitor–based treatment and may have received up to two prior lines of endocrine therapy and up to one line of chemotherapy.

Patients were randomized to either 400 mg of oral capivasertib or placebo twice daily for 4 days, followed by 3 days off treatment each week over a 28-day treatment cycle. Patients in both arms received 500 mg intramuscular fulvestrant on cycle 1 days 1 and 15, and then every 28 days thereafter. Treatment continued until disease progression or unacceptable toxicity.

In the 289 patients with PIK3CA/AKT1/PTEN–altered tumors, median progression-free survival (PFS) in the capivasertib arm was 7.3 months versus 3.1 months in the placebo group (hazard ratio, 0.50).

An exploratory analysis of PFS in the 313 (44%) patients whose tumors did not have a PIK3CA/AKT1/PTEN alteration demonstrated a less notable benefit to the combination (HR, 0.79; 95% confidence interval, 0.61-1.02), indicating that “the difference in the overall population was primarily attributed to the results seen in the population of patients whose tumors have PIK3CA/AKT1/PTEN alteration,” the FDA explained.

Adverse reactions occurring in at least 20% of patients included decreased lymphocytes, leukocytes, hemoglobin, and neutrophils; increased fasting glucose, creatinine, and triglycerides; and diarrhea, nausea, fatigue, vomiting, and stomatitis.

The recommended capivasertib dose is 400 mg orally twice daily, given about 12 hours apart with or without food, for 4 days followed by 3 off days until disease progression or unacceptable toxicity, according to the prescribing information.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration has approved capivasertib (Truqap, AstraZeneca Pharmaceuticals) with fulvestrant for certain previously treated adults with hormone receptor (HR)–positive, human epidermal growth factor receptor (HER2)–negative, locally advanced or metastatic breast cancer.

Specifically, the first-in-class AKT kinase inhibitor approval is for patients with one or more PIK3CA/AKT1/PTEN alterations, as detected by an FDA-approved test, whose metastatic disease progressed on at least one endocrine-based regimen or who experienced recurrence on or within 12 months of completing adjuvant therapy, according to the FDA approval announcement.

Olivier Le Moal/Getty Images

The FDA also approved a companion diagnostic device, the FoundationOne CDx assay, to identify patients who are eligible for treatment with capivasertib.

Approval of capivasertib was based on findings from the randomized, placebo-controlled, phase 3 CAPItello-291 trial, which involved 708 patients with locally advanced or metastatic HR-positive, HER2-negative breast cancer, including 289 whose tumors had PIK3CA/AKT1/PTEN alterations. All had progressed on aromatase inhibitor–based treatment and may have received up to two prior lines of endocrine therapy and up to one line of chemotherapy.

Patients were randomized to either 400 mg of oral capivasertib or placebo twice daily for 4 days, followed by 3 days off treatment each week over a 28-day treatment cycle. Patients in both arms received 500 mg intramuscular fulvestrant on cycle 1 days 1 and 15, and then every 28 days thereafter. Treatment continued until disease progression or unacceptable toxicity.

In the 289 patients with PIK3CA/AKT1/PTEN–altered tumors, median progression-free survival (PFS) in the capivasertib arm was 7.3 months versus 3.1 months in the placebo group (hazard ratio, 0.50).

An exploratory analysis of PFS in the 313 (44%) patients whose tumors did not have a PIK3CA/AKT1/PTEN alteration demonstrated a less notable benefit to the combination (HR, 0.79; 95% confidence interval, 0.61-1.02), indicating that “the difference in the overall population was primarily attributed to the results seen in the population of patients whose tumors have PIK3CA/AKT1/PTEN alteration,” the FDA explained.

Adverse reactions occurring in at least 20% of patients included decreased lymphocytes, leukocytes, hemoglobin, and neutrophils; increased fasting glucose, creatinine, and triglycerides; and diarrhea, nausea, fatigue, vomiting, and stomatitis.

The recommended capivasertib dose is 400 mg orally twice daily, given about 12 hours apart with or without food, for 4 days followed by 3 off days until disease progression or unacceptable toxicity, according to the prescribing information.

A version of this article first appeared on Medscape.com.

False-positive mammography results are common, but a large population-based cohort study conducted in Sweden found an elevated incidence of developing and dying of breast cancer up to 20 years after a false-positive result.

Women with a false-positive mammography result had 61% greater risk of developing breast cancer and an 84% greater risk of dying of breast cancer, compared with those who did not have a false-positive result.

However, the investigators also found that the risk for breast cancer varied by individual characteristics such as age and breast density.

The analysis provides clues about which patients with false-positive mammography results will go on to develop breast cancer and “can be used to develop individualized risk-based breast cancer screening,” said the investigators, led by Xinhe Mao, MSc, of Karolinska Institute, Stockholm.

The findings were published online in JAMA Oncology.

About 11% of women in the United States and 2.5% in Europe will receive a false-positive result after a single mammography screening, and previous research shows that these women have a higher risk of developing breast cancer, compared with women without false-positive results. Still, whether this risk for breast cancer varies by individual characteristics and whether an association between a false-positive mammography result and mortality exists remain unclear.

To assess long-term outcomes after a false-positive result, the study investigators compared 45,213 women who had a false-positive mammography result between 1991 and 2017 with 452,130 controls matched for age, calendar year of mammography, and screening history. These data came from the Stockholm Mammography Screening program and Swedish nationwide registers. The analysis also included 1,113 women with a false-positive result and 11,130 matched controls with information on mammographic breast density from the Karolinska Mammography Project for Risk Prediction of Breast Cancer study. 

Among women with a false-positive result, the 20-year cumulative breast cancer incidence was 11.3% compared with 7.3% among those without a false-positive (adjusted hazard ratio, 1.61).

Breast cancer risk was higher in older women – those aged 60-75 years (HR, 2.02) – vs younger women aged 40-49 years (HR, 1.38). Breast cancer risk was also higher among women with less dense breasts (HR, 4.65) vs more dense breasts (HR, 1.60) and those who underwent a biopsy during recall (HR, 1.77) vs those who did not (HR, 1.51).

After a false-positive result, cancers were more likely to occur on the ipsilateral side to the false-positive result (HR, 1.92) versus the contralateral (HR, 1.28) and were more common during the first 4 years of follow-up (HR, 2.57 in the first 2 years and 1.93 between 2 and 4 years). No statistical differences were observed based on tumor characteristics, aside from tumor size (HR, 1.78 for tumors ≥ 20 mm vs. 1.47 for smaller tumors).

The prognosis of patients with breast cancer did not differ on the basis of whether they had false-positive results before diagnosis (HR, 1.05 for a false-positive result versus no false-positive result; 95% CI, 0.89-1.25).

This study is the first to show that “women with a false-positive result are at increased risk of death from breast cancer,” Ms. Mao and colleagues concluded. This finding is “most probably associated with the increased breast cancer incidence,” given that the prognosis of patients with breast cancer was similar among those who had a false-positive result versus those who did not.

The authors noted that the increased risk for breast cancer after a false-positive result could suggest that false positives indicate the presence of small tumors that were missed or generally indicate a higher risk for breast cancer. Other factors, such as hormones or genetics, may be at play as well, but would need to be investigated in further studies, Ms. Mao and colleagues noted.

When individualizing surveillance after a false-positive result, age and breast density should be considered, the authors explained. Clinicians may also want to provide more intensive surveillance in the years after a false-positive result as well as education to patients about the risks associated with a false-positive result.

Overall, the findings indicate that clinicians “ should stress the importance of continued screening in women with false-positive results, given their higher risk of cancer, especially within the first 5 or so years after a false-positive result,” Diana L. Miglioretti, PhD, professor and division chief of biostatistics at the University of California, Davis, said in an interview.

Dr. Miglioretti, who has led research on false-positive mammography results and approaches to reduce false positives, noted that “this is a very important study confirming prior work by the Breast Cancer Surveillance Consortium showing individuals with false-positive screening mammography results are at increased risk of developing breast cancer in the future.”

The new evidence demonstrated an increased risk for death from breast cancer in patients who have a false-positive result is particularly worrisome because some studies suggest that women with false-positive results are less likely to return for screening, perhaps because of their negative experience, Dr. Miglioretti said.

However, her own research has shown that providing immediate screening mammography interpretation and same-day diagnostic workup to individuals who have not had a mammogram in the past 5 years and to younger women could prevent 40% of people from needing to return for diagnostic workup later and potentially reduce time to diagnosis for those with cancer.

It is “important that radiology facilities find ways to reduce false-positive results and the anxiety associated with these results,” Dr. Miglioretti said.

This study was supported by grants from the Swedish Research Council, the Swedish Cancer Society, the Stockholm County Council, and FORTE. Ms. Mao is supported by a grant from the China Scholarship Council. Dr. Miglioretti received funding from PCORI and NCI and royalties from Elsevier.

A version of this article first appeared on Medscape.com.

False-positive mammography results are common, but a large population-based cohort study conducted in Sweden found an elevated incidence of developing and dying of breast cancer up to 20 years after a false-positive result.

Women with a false-positive mammography result had 61% greater risk of developing breast cancer and an 84% greater risk of dying of breast cancer, compared with those who did not have a false-positive result.

However, the investigators also found that the risk for breast cancer varied by individual characteristics such as age and breast density.

The analysis provides clues about which patients with false-positive mammography results will go on to develop breast cancer and “can be used to develop individualized risk-based breast cancer screening,” said the investigators, led by Xinhe Mao, MSc, of Karolinska Institute, Stockholm.

The findings were published online in JAMA Oncology.

About 11% of women in the United States and 2.5% in Europe will receive a false-positive result after a single mammography screening, and previous research shows that these women have a higher risk of developing breast cancer, compared with women without false-positive results. Still, whether this risk for breast cancer varies by individual characteristics and whether an association between a false-positive mammography result and mortality exists remain unclear.

To assess long-term outcomes after a false-positive result, the study investigators compared 45,213 women who had a false-positive mammography result between 1991 and 2017 with 452,130 controls matched for age, calendar year of mammography, and screening history. These data came from the Stockholm Mammography Screening program and Swedish nationwide registers. The analysis also included 1,113 women with a false-positive result and 11,130 matched controls with information on mammographic breast density from the Karolinska Mammography Project for Risk Prediction of Breast Cancer study. 

Among women with a false-positive result, the 20-year cumulative breast cancer incidence was 11.3% compared with 7.3% among those without a false-positive (adjusted hazard ratio, 1.61).

Breast cancer risk was higher in older women – those aged 60-75 years (HR, 2.02) – vs younger women aged 40-49 years (HR, 1.38). Breast cancer risk was also higher among women with less dense breasts (HR, 4.65) vs more dense breasts (HR, 1.60) and those who underwent a biopsy during recall (HR, 1.77) vs those who did not (HR, 1.51).

After a false-positive result, cancers were more likely to occur on the ipsilateral side to the false-positive result (HR, 1.92) versus the contralateral (HR, 1.28) and were more common during the first 4 years of follow-up (HR, 2.57 in the first 2 years and 1.93 between 2 and 4 years). No statistical differences were observed based on tumor characteristics, aside from tumor size (HR, 1.78 for tumors ≥ 20 mm vs. 1.47 for smaller tumors).

The prognosis of patients with breast cancer did not differ on the basis of whether they had false-positive results before diagnosis (HR, 1.05 for a false-positive result versus no false-positive result; 95% CI, 0.89-1.25).

This study is the first to show that “women with a false-positive result are at increased risk of death from breast cancer,” Ms. Mao and colleagues concluded. This finding is “most probably associated with the increased breast cancer incidence,” given that the prognosis of patients with breast cancer was similar among those who had a false-positive result versus those who did not.

The authors noted that the increased risk for breast cancer after a false-positive result could suggest that false positives indicate the presence of small tumors that were missed or generally indicate a higher risk for breast cancer. Other factors, such as hormones or genetics, may be at play as well, but would need to be investigated in further studies, Ms. Mao and colleagues noted.

When individualizing surveillance after a false-positive result, age and breast density should be considered, the authors explained. Clinicians may also want to provide more intensive surveillance in the years after a false-positive result as well as education to patients about the risks associated with a false-positive result.

Overall, the findings indicate that clinicians “ should stress the importance of continued screening in women with false-positive results, given their higher risk of cancer, especially within the first 5 or so years after a false-positive result,” Diana L. Miglioretti, PhD, professor and division chief of biostatistics at the University of California, Davis, said in an interview.

Dr. Miglioretti, who has led research on false-positive mammography results and approaches to reduce false positives, noted that “this is a very important study confirming prior work by the Breast Cancer Surveillance Consortium showing individuals with false-positive screening mammography results are at increased risk of developing breast cancer in the future.”

The new evidence demonstrated an increased risk for death from breast cancer in patients who have a false-positive result is particularly worrisome because some studies suggest that women with false-positive results are less likely to return for screening, perhaps because of their negative experience, Dr. Miglioretti said.

However, her own research has shown that providing immediate screening mammography interpretation and same-day diagnostic workup to individuals who have not had a mammogram in the past 5 years and to younger women could prevent 40% of people from needing to return for diagnostic workup later and potentially reduce time to diagnosis for those with cancer.

It is “important that radiology facilities find ways to reduce false-positive results and the anxiety associated with these results,” Dr. Miglioretti said.

This study was supported by grants from the Swedish Research Council, the Swedish Cancer Society, the Stockholm County Council, and FORTE. Ms. Mao is supported by a grant from the China Scholarship Council. Dr. Miglioretti received funding from PCORI and NCI and royalties from Elsevier.

A version of this article first appeared on Medscape.com.

False-positive mammography results are common, but a large population-based cohort study conducted in Sweden found an elevated incidence of developing and dying of breast cancer up to 20 years after a false-positive result.

Women with a false-positive mammography result had 61% greater risk of developing breast cancer and an 84% greater risk of dying of breast cancer, compared with those who did not have a false-positive result.

However, the investigators also found that the risk for breast cancer varied by individual characteristics such as age and breast density.

The analysis provides clues about which patients with false-positive mammography results will go on to develop breast cancer and “can be used to develop individualized risk-based breast cancer screening,” said the investigators, led by Xinhe Mao, MSc, of Karolinska Institute, Stockholm.

The findings were published online in JAMA Oncology.

About 11% of women in the United States and 2.5% in Europe will receive a false-positive result after a single mammography screening, and previous research shows that these women have a higher risk of developing breast cancer, compared with women without false-positive results. Still, whether this risk for breast cancer varies by individual characteristics and whether an association between a false-positive mammography result and mortality exists remain unclear.

To assess long-term outcomes after a false-positive result, the study investigators compared 45,213 women who had a false-positive mammography result between 1991 and 2017 with 452,130 controls matched for age, calendar year of mammography, and screening history. These data came from the Stockholm Mammography Screening program and Swedish nationwide registers. The analysis also included 1,113 women with a false-positive result and 11,130 matched controls with information on mammographic breast density from the Karolinska Mammography Project for Risk Prediction of Breast Cancer study. 

Among women with a false-positive result, the 20-year cumulative breast cancer incidence was 11.3% compared with 7.3% among those without a false-positive (adjusted hazard ratio, 1.61).

Breast cancer risk was higher in older women – those aged 60-75 years (HR, 2.02) – vs younger women aged 40-49 years (HR, 1.38). Breast cancer risk was also higher among women with less dense breasts (HR, 4.65) vs more dense breasts (HR, 1.60) and those who underwent a biopsy during recall (HR, 1.77) vs those who did not (HR, 1.51).

After a false-positive result, cancers were more likely to occur on the ipsilateral side to the false-positive result (HR, 1.92) versus the contralateral (HR, 1.28) and were more common during the first 4 years of follow-up (HR, 2.57 in the first 2 years and 1.93 between 2 and 4 years). No statistical differences were observed based on tumor characteristics, aside from tumor size (HR, 1.78 for tumors ≥ 20 mm vs. 1.47 for smaller tumors).

The prognosis of patients with breast cancer did not differ on the basis of whether they had false-positive results before diagnosis (HR, 1.05 for a false-positive result versus no false-positive result; 95% CI, 0.89-1.25).

This study is the first to show that “women with a false-positive result are at increased risk of death from breast cancer,” Ms. Mao and colleagues concluded. This finding is “most probably associated with the increased breast cancer incidence,” given that the prognosis of patients with breast cancer was similar among those who had a false-positive result versus those who did not.

The authors noted that the increased risk for breast cancer after a false-positive result could suggest that false positives indicate the presence of small tumors that were missed or generally indicate a higher risk for breast cancer. Other factors, such as hormones or genetics, may be at play as well, but would need to be investigated in further studies, Ms. Mao and colleagues noted.

When individualizing surveillance after a false-positive result, age and breast density should be considered, the authors explained. Clinicians may also want to provide more intensive surveillance in the years after a false-positive result as well as education to patients about the risks associated with a false-positive result.

Overall, the findings indicate that clinicians “ should stress the importance of continued screening in women with false-positive results, given their higher risk of cancer, especially within the first 5 or so years after a false-positive result,” Diana L. Miglioretti, PhD, professor and division chief of biostatistics at the University of California, Davis, said in an interview.

Dr. Miglioretti, who has led research on false-positive mammography results and approaches to reduce false positives, noted that “this is a very important study confirming prior work by the Breast Cancer Surveillance Consortium showing individuals with false-positive screening mammography results are at increased risk of developing breast cancer in the future.”

The new evidence demonstrated an increased risk for death from breast cancer in patients who have a false-positive result is particularly worrisome because some studies suggest that women with false-positive results are less likely to return for screening, perhaps because of their negative experience, Dr. Miglioretti said.

However, her own research has shown that providing immediate screening mammography interpretation and same-day diagnostic workup to individuals who have not had a mammogram in the past 5 years and to younger women could prevent 40% of people from needing to return for diagnostic workup later and potentially reduce time to diagnosis for those with cancer.

It is “important that radiology facilities find ways to reduce false-positive results and the anxiety associated with these results,” Dr. Miglioretti said.

This study was supported by grants from the Swedish Research Council, the Swedish Cancer Society, the Stockholm County Council, and FORTE. Ms. Mao is supported by a grant from the China Scholarship Council. Dr. Miglioretti received funding from PCORI and NCI and royalties from Elsevier.

A version of this article first appeared on Medscape.com.

Key clinical point: In women with locally advanced breast cancer (LABC) who received neoadjuvant treatment (NAT) followed by breast surgery, the type of breast surgery, pathological complete response (pCR), body mass index (BMI), and pretreatment stage of tumors were the significant predictors of survival outcomes.

Major finding: Overall survival was significantly improved in patients with LABC who did vs did not achieve pCR (odds ratio [OR] 0.42; P = .008). However, it was much worsened in patients who underwent mastectomy vs breast-conserving surgery (BCS; OR 1.678; P = .024), had higher vs lower BMI (OR 1.031; P = .017), and had stage IIIB or IIIC vs IIB tumors (OR 2.450; P < .001).

Study details: Findings are from a retrospective cohort study including 530 patients with LABC, of which 24.6% of patients underwent BCS after receiving NAT.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Nobrega GB et al. Locally advanced breast cancer: Breast-conserving surgery and other factors linked to overall survival after neoadjuvant treatment. Front Oncol. 2023;13:1293288 (Nov 6). doi: 10.3389/fonc.2023.1293288

Key clinical point: In women with locally advanced breast cancer (LABC) who received neoadjuvant treatment (NAT) followed by breast surgery, the type of breast surgery, pathological complete response (pCR), body mass index (BMI), and pretreatment stage of tumors were the significant predictors of survival outcomes.

Major finding: Overall survival was significantly improved in patients with LABC who did vs did not achieve pCR (odds ratio [OR] 0.42; P = .008). However, it was much worsened in patients who underwent mastectomy vs breast-conserving surgery (BCS; OR 1.678; P = .024), had higher vs lower BMI (OR 1.031; P = .017), and had stage IIIB or IIIC vs IIB tumors (OR 2.450; P < .001).

Study details: Findings are from a retrospective cohort study including 530 patients with LABC, of which 24.6% of patients underwent BCS after receiving NAT.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Nobrega GB et al. Locally advanced breast cancer: Breast-conserving surgery and other factors linked to overall survival after neoadjuvant treatment. Front Oncol. 2023;13:1293288 (Nov 6). doi: 10.3389/fonc.2023.1293288

Key clinical point: In women with locally advanced breast cancer (LABC) who received neoadjuvant treatment (NAT) followed by breast surgery, the type of breast surgery, pathological complete response (pCR), body mass index (BMI), and pretreatment stage of tumors were the significant predictors of survival outcomes.

Major finding: Overall survival was significantly improved in patients with LABC who did vs did not achieve pCR (odds ratio [OR] 0.42; P = .008). However, it was much worsened in patients who underwent mastectomy vs breast-conserving surgery (BCS; OR 1.678; P = .024), had higher vs lower BMI (OR 1.031; P = .017), and had stage IIIB or IIIC vs IIB tumors (OR 2.450; P < .001).

Study details: Findings are from a retrospective cohort study including 530 patients with LABC, of which 24.6% of patients underwent BCS after receiving NAT.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Nobrega GB et al. Locally advanced breast cancer: Breast-conserving surgery and other factors linked to overall survival after neoadjuvant treatment. Front Oncol. 2023;13:1293288 (Nov 6). doi: 10.3389/fonc.2023.1293288

Key clinical point: Patients with breast cancer (BC) who underwent post-mastectomy breast reconstruction followed by post-mastectomy radiotherapy (PMRT) had an increased risk for postoperative complications, such as infections and contractures, than those who did not receive PMRT.

Major finding: Patients who did vs did not receive PMRT had a significantly higher risk for postoperative wound infections (odds ratio [OR] 1.95; P = .003) and skin contractures (OR 7.24; P = .005).

Study details: Findings are from a meta-analysis of 11 studies including 2288 patients with BC who underwent breast reconstruction, of which 516 patients received PMRT after breast reconstruction.

Disclosures: This study did not report any source of funding. The authors declared no conflicts of interest.

Source: Huang N, Lu L, et al. Effect of radiation therapy during surgery on postoperative wound complications after breast reconstruction in patients with breast cancer: A meta-analysis. Int Wound J. 2023 (Oct 31). doi: 10.1111/iwj.14473

Key clinical point: Patients with breast cancer (BC) who underwent post-mastectomy breast reconstruction followed by post-mastectomy radiotherapy (PMRT) had an increased risk for postoperative complications, such as infections and contractures, than those who did not receive PMRT.

Major finding: Patients who did vs did not receive PMRT had a significantly higher risk for postoperative wound infections (odds ratio [OR] 1.95; P = .003) and skin contractures (OR 7.24; P = .005).

Study details: Findings are from a meta-analysis of 11 studies including 2288 patients with BC who underwent breast reconstruction, of which 516 patients received PMRT after breast reconstruction.

Disclosures: This study did not report any source of funding. The authors declared no conflicts of interest.

Source: Huang N, Lu L, et al. Effect of radiation therapy during surgery on postoperative wound complications after breast reconstruction in patients with breast cancer: A meta-analysis. Int Wound J. 2023 (Oct 31). doi: 10.1111/iwj.14473

Key clinical point: Patients with breast cancer (BC) who underwent post-mastectomy breast reconstruction followed by post-mastectomy radiotherapy (PMRT) had an increased risk for postoperative complications, such as infections and contractures, than those who did not receive PMRT.

Major finding: Patients who did vs did not receive PMRT had a significantly higher risk for postoperative wound infections (odds ratio [OR] 1.95; P = .003) and skin contractures (OR 7.24; P = .005).

Study details: Findings are from a meta-analysis of 11 studies including 2288 patients with BC who underwent breast reconstruction, of which 516 patients received PMRT after breast reconstruction.

Disclosures: This study did not report any source of funding. The authors declared no conflicts of interest.

Source: Huang N, Lu L, et al. Effect of radiation therapy during surgery on postoperative wound complications after breast reconstruction in patients with breast cancer: A meta-analysis. Int Wound J. 2023 (Oct 31). doi: 10.1111/iwj.14473

Key clinical point: Robotic nipple-sparing mastectomy (RNSM) may soon become a viable option for breast cancer (BC) surgery as it is associated with lower postoperative complication rates than conventional NSM (CNSM).

Major finding: RNSM vs CNSM was associated with a significantly lower rate of nipple necrosis, a major postoperative complication (odds ratio 0.54; P = .03), and intraoperative blood loss (mean difference [MD] −53.18 mL; P < .00001), but a significantly higher operating time (MD +58.81 min; P < .001).

Study details: Findings are from a meta-analysis of seven studies including 1674 women with BC who underwent RNSM (50.9%) or CNSM (49.1%).

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Nessa A et al. Postoperative complications and surgical outcomes of robotic versus conventional nipple-sparing mastectomy in breast cancer: Meta-analysis. Br J Surg. 2023 (Oct 27). doi: 10.1093/bjs/znad336

Key clinical point: Robotic nipple-sparing mastectomy (RNSM) may soon become a viable option for breast cancer (BC) surgery as it is associated with lower postoperative complication rates than conventional NSM (CNSM).

Major finding: RNSM vs CNSM was associated with a significantly lower rate of nipple necrosis, a major postoperative complication (odds ratio 0.54; P = .03), and intraoperative blood loss (mean difference [MD] −53.18 mL; P < .00001), but a significantly higher operating time (MD +58.81 min; P < .001).

Study details: Findings are from a meta-analysis of seven studies including 1674 women with BC who underwent RNSM (50.9%) or CNSM (49.1%).

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Nessa A et al. Postoperative complications and surgical outcomes of robotic versus conventional nipple-sparing mastectomy in breast cancer: Meta-analysis. Br J Surg. 2023 (Oct 27). doi: 10.1093/bjs/znad336

Key clinical point: Robotic nipple-sparing mastectomy (RNSM) may soon become a viable option for breast cancer (BC) surgery as it is associated with lower postoperative complication rates than conventional NSM (CNSM).

Major finding: RNSM vs CNSM was associated with a significantly lower rate of nipple necrosis, a major postoperative complication (odds ratio 0.54; P = .03), and intraoperative blood loss (mean difference [MD] −53.18 mL; P < .00001), but a significantly higher operating time (MD +58.81 min; P < .001).

Study details: Findings are from a meta-analysis of seven studies including 1674 women with BC who underwent RNSM (50.9%) or CNSM (49.1%).

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Nessa A et al. Postoperative complications and surgical outcomes of robotic versus conventional nipple-sparing mastectomy in breast cancer: Meta-analysis. Br J Surg. 2023 (Oct 27). doi: 10.1093/bjs/znad336

Key clinical point: Adjuvant chemotherapy significantly improved the overall survival (OS) outcomes in patients with small-size (T1b and T1c) node-negative triple-negative breast cancer (TNBC).

Major finding: Adjuvant chemotherapy led to significantly better OS outcomes in patients with T1b TNBC (adjusted hazard ratio [aHR] 0.52; P < .001) and improved both OS (aHR 0.54; P < .001) and breast cancer-specific survival (aHR 0.79; P = .043) in those with T1c TNBC.

Study details: This retrospective study analyzed the data from the Surveillance, Epidemiology, and End Results (SEER) database and included 11,510 women with T1b (n = 3388) or T1c (n = 8122) node-negative TNBC, of whom 8029 patients received adjuvant chemotherapy.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Carbajal-Ochoa W et al. Benefit of adjuvant chemotherapy in lymph node-negative, T1b and T1c triple-negative breast cancer. Breast Cancer Res Treat. 2023 (Oct 13). doi: 10.1007/s10549-023-07132-6

Key clinical point: Adjuvant chemotherapy significantly improved the overall survival (OS) outcomes in patients with small-size (T1b and T1c) node-negative triple-negative breast cancer (TNBC).

Major finding: Adjuvant chemotherapy led to significantly better OS outcomes in patients with T1b TNBC (adjusted hazard ratio [aHR] 0.52; P < .001) and improved both OS (aHR 0.54; P < .001) and breast cancer-specific survival (aHR 0.79; P = .043) in those with T1c TNBC.

Study details: This retrospective study analyzed the data from the Surveillance, Epidemiology, and End Results (SEER) database and included 11,510 women with T1b (n = 3388) or T1c (n = 8122) node-negative TNBC, of whom 8029 patients received adjuvant chemotherapy.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Carbajal-Ochoa W et al. Benefit of adjuvant chemotherapy in lymph node-negative, T1b and T1c triple-negative breast cancer. Breast Cancer Res Treat. 2023 (Oct 13). doi: 10.1007/s10549-023-07132-6

Key clinical point: Adjuvant chemotherapy significantly improved the overall survival (OS) outcomes in patients with small-size (T1b and T1c) node-negative triple-negative breast cancer (TNBC).

Major finding: Adjuvant chemotherapy led to significantly better OS outcomes in patients with T1b TNBC (adjusted hazard ratio [aHR] 0.52; P < .001) and improved both OS (aHR 0.54; P < .001) and breast cancer-specific survival (aHR 0.79; P = .043) in those with T1c TNBC.

Study details: This retrospective study analyzed the data from the Surveillance, Epidemiology, and End Results (SEER) database and included 11,510 women with T1b (n = 3388) or T1c (n = 8122) node-negative TNBC, of whom 8029 patients received adjuvant chemotherapy.

Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.

Source: Carbajal-Ochoa W et al. Benefit of adjuvant chemotherapy in lymph node-negative, T1b and T1c triple-negative breast cancer. Breast Cancer Res Treat. 2023 (Oct 13). doi: 10.1007/s10549-023-07132-6

Key clinical point: Pregnancy had no detrimental effects on survival outcomes and can be considered safe for young women who were previously diagnosed with and underwent treatment for hormone receptor-positive (HR+) early breast cancer (BC).

Major finding: Patients with a history of HR+ BC who did vs did not conceive after treatment showed better overall survival outcomes (hazard ratio 0.46; P < .005); however, the disease-free survival outcomes were comparable for both groups (P = .781).

Study details: Findings are from a meta-analysis of eight retrospective cohort studies including 3805 young women with HR+ invasive early BC, of whom 1285 women conceived post treatment.

Disclosures: This study was partially supported by the Italian Association for Cancer Research and the Italian Ministry of Health. Several authors declared receiving research support, honoraria, research funding, personal fees, grants, or consulting fees from or having ties with various sources.

Source: Arecco L et al. Safety of pregnancy after breast cancer in young women with hormone receptor-positive disease: A systematic review and meta-analysis. ESMO Open. 2023;8(6):102031 (Oct 23). doi: 10.1016/j.esmoop.2023.102031

Key clinical point: Pregnancy had no detrimental effects on survival outcomes and can be considered safe for young women who were previously diagnosed with and underwent treatment for hormone receptor-positive (HR+) early breast cancer (BC).

Major finding: Patients with a history of HR+ BC who did vs did not conceive after treatment showed better overall survival outcomes (hazard ratio 0.46; P < .005); however, the disease-free survival outcomes were comparable for both groups (P = .781).

Study details: Findings are from a meta-analysis of eight retrospective cohort studies including 3805 young women with HR+ invasive early BC, of whom 1285 women conceived post treatment.

Disclosures: This study was partially supported by the Italian Association for Cancer Research and the Italian Ministry of Health. Several authors declared receiving research support, honoraria, research funding, personal fees, grants, or consulting fees from or having ties with various sources.

Source: Arecco L et al. Safety of pregnancy after breast cancer in young women with hormone receptor-positive disease: A systematic review and meta-analysis. ESMO Open. 2023;8(6):102031 (Oct 23). doi: 10.1016/j.esmoop.2023.102031

Key clinical point: Pregnancy had no detrimental effects on survival outcomes and can be considered safe for young women who were previously diagnosed with and underwent treatment for hormone receptor-positive (HR+) early breast cancer (BC).

Major finding: Patients with a history of HR+ BC who did vs did not conceive after treatment showed better overall survival outcomes (hazard ratio 0.46; P < .005); however, the disease-free survival outcomes were comparable for both groups (P = .781).

Study details: Findings are from a meta-analysis of eight retrospective cohort studies including 3805 young women with HR+ invasive early BC, of whom 1285 women conceived post treatment.

Disclosures: This study was partially supported by the Italian Association for Cancer Research and the Italian Ministry of Health. Several authors declared receiving research support, honoraria, research funding, personal fees, grants, or consulting fees from or having ties with various sources.

Source: Arecco L et al. Safety of pregnancy after breast cancer in young women with hormone receptor-positive disease: A systematic review and meta-analysis. ESMO Open. 2023;8(6):102031 (Oct 23). doi: 10.1016/j.esmoop.2023.102031

Key clinical point: Detection of breast cancer (BC) by screening vs clinical or other non-screening procedures led to significantly improved disease-free interval outcomes.

Major finding: After correcting for lead time bias, the 10-year disease-free interval was improved significantly in women with screen-detected vs clinically-detected cancer (adjusted hazard ratio [aHR] 0.77; 95% CI 0.68-0.87), with similar improvements observed in 5-year disease-free interval in women with screen-detected vs non-screen-related cancer (aHR 0.76; 95% CI 0.66-0.88).

Study details: Findings are from an analysis of two cohorts including 6215 and 15,176 women with invasive, non-metastatic BC who underwent surgery and were followed for 10 and 5 years, respectively, of which 55.8% of women in either of the cohorts had a screen-detected cancer.

Disclosures: This study did not declare any specific funding. S Siesling declared receiving support and serving as an advisor for various sources. The other authors declared no conflicts of interest.

Source: de Munck L et al. Method of primary breast cancer detection and the disease-free interval, adjusting for lead time. J Natl Cancer Inst. 2023 (Nov 3). doi: 10.1093/jnci/djad230

Key clinical point: Detection of breast cancer (BC) by screening vs clinical or other non-screening procedures led to significantly improved disease-free interval outcomes.

Major finding: After correcting for lead time bias, the 10-year disease-free interval was improved significantly in women with screen-detected vs clinically-detected cancer (adjusted hazard ratio [aHR] 0.77; 95% CI 0.68-0.87), with similar improvements observed in 5-year disease-free interval in women with screen-detected vs non-screen-related cancer (aHR 0.76; 95% CI 0.66-0.88).

Study details: Findings are from an analysis of two cohorts including 6215 and 15,176 women with invasive, non-metastatic BC who underwent surgery and were followed for 10 and 5 years, respectively, of which 55.8% of women in either of the cohorts had a screen-detected cancer.

Disclosures: This study did not declare any specific funding. S Siesling declared receiving support and serving as an advisor for various sources. The other authors declared no conflicts of interest.

Source: de Munck L et al. Method of primary breast cancer detection and the disease-free interval, adjusting for lead time. J Natl Cancer Inst. 2023 (Nov 3). doi: 10.1093/jnci/djad230

Key clinical point: Detection of breast cancer (BC) by screening vs clinical or other non-screening procedures led to significantly improved disease-free interval outcomes.

Major finding: After correcting for lead time bias, the 10-year disease-free interval was improved significantly in women with screen-detected vs clinically-detected cancer (adjusted hazard ratio [aHR] 0.77; 95% CI 0.68-0.87), with similar improvements observed in 5-year disease-free interval in women with screen-detected vs non-screen-related cancer (aHR 0.76; 95% CI 0.66-0.88).

Study details: Findings are from an analysis of two cohorts including 6215 and 15,176 women with invasive, non-metastatic BC who underwent surgery and were followed for 10 and 5 years, respectively, of which 55.8% of women in either of the cohorts had a screen-detected cancer.

Disclosures: This study did not declare any specific funding. S Siesling declared receiving support and serving as an advisor for various sources. The other authors declared no conflicts of interest.

Source: de Munck L et al. Method of primary breast cancer detection and the disease-free interval, adjusting for lead time. J Natl Cancer Inst. 2023 (Nov 3). doi: 10.1093/jnci/djad230