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Educate patients about dense breasts and cancer risk

Monica Saini, MD, a radiologist in Santa Fe, New Mexico, and JoAnn Pushkin, executive director of the nonprofit educational website DenseBreast-info.org, engaged ObGyn attendees on “Breast density: Why it matters and what to do” at the American College of Obstetricians and Gynecologists (ACOG) 2017 Annual Clinical and Scientific Meeting (May 6–9, 2017) in San Diego, California. The program was sponsored by GE Healthcare.

DENSE BREASTS ARE A RISK FACTOR FOR CANCER

Breast density is the second largest risk factor for breast cancer after radiation treatment to the chest, so it is important to identify patients with dense breasts, according to Dr. Saini. The American College of Radiology’s Breast Imaging Reporting and Data System (BI-RADS) classifies breast density into 4 groups: 1) almost entirely fatty, 2) scattered fibroglandular densities, 3) heterogeneously dense, and 4) extremely dense. A woman whose mammograms show heterogeneously dense or extremely dense breasts is considered to have “dense breasts.”

Cancer is often difficult to identify with mammography in dense breasts because masses or lumps appear as white on a white (dense tissue) background; by contrast, a tumor in a nondense (fatty) breast would appear as white on a dark, fatty tissue background. Approximately one-third of cancers in dense breasts have a delayed diagnosis on mammography, and 70% of cancers occur in dense breasts, said Dr. Saini.

Having dense breasts is not an abnormal condition, however, and is actually common—about 40% of women aged 40 or older have dense breasts.

Supplement mammography with other screening modalities

While screening mammograms can save lives, mammography should not be viewed as a one-size-fits-all modality. Screening for breast cancer should be personalized, based on, among other factors, a woman’s personal and family history, age, genetic risk, lifestyle factors, and breast density.

Key point. Women with dense breasts should continue to have screening mammograms. In addition, mammography for these patients should be supplemented with other technologies, such as 3D mammography (digital tomosynthesis), handheld ultrasound, or automated breast ultrasound (ABUS). In women at higher risk (presence of BRCA1 or BRCA2 gene mutation, strong family history of breast cancer, or radiation treatment to the chest) magnetic resonance imaging (MRI) may be considered.

Data on adjunct screening modalities. Dr. Saini discussed the results of the ASTOUND trial, a prospective multicenter study that compared ultrasound and tomosynthesis for the detection of breast cancer in mammography-negative dense breasts.1 Among the 3,231 asymptomatic women included in the trial, 13 breast cancers were detected with tomosynthesis (incremental cancer detection rate [CDR], 4 per 1,000 screens; 95% confidence interval [CI], 1.8–6.2) and 23 were detected with ultrasound (incremental CDR, 7.1 per 1,000 screens; 95% CI, 4.4–10.0), P = .006. There were 107 false-positive results: 53 with tomosynthesis and 65 with ultrasound, a difference that was not statistically significant. The study authors noted that while ultrasound had better incremental breast cancer detection than tomosynthesis, and at a similar false-positive recall rate, tomosynthesis did detect more than half of the additional breast cancers in these women.1

Make screening easier for the patient

Dr. Saini noted that for women with dense breasts, performing mammography and adjunctive screening at the same visit is convenient for the patient. Physicians can also write prescriptions for follow-up based on density findings, for example, “3D mammography if available, if dense, order ultrasound.”

Read how to answer patient questions about breast density

 

 

ARE YOU READY TO ANSWER PATIENT QUESTIONS ABOUT BREAST DENSITY?

That is the question JoAnn Pushkin, executive director of DenseBreast-info.org, asked in her presentation. You should discuss with patients exactly what it means to have dense breasts, breast density as an independent risk factor for cancer, the breast imaging technologies available for screening (mammography, tomosynthesis, ultrasound, contrast-enhanced MRI), the risks and benefits of each screening modality, and surveillance intervals for women with dense breasts. Good communication with the patient’s radiology team assists in formulating an individualized screening strategy.

Patients may have concerns about the information provided—or not provided—in their state’s breast density notification letter after a mammogram. Currently, 31 states mandate some type of breast density notification, while 4 states have efforts for density reporting or education that do not require notification. The information given to patients and how they will be informed varies by state. Some states, for example, require that patients who have heterogeneously or extremely dense breasts be informed of this by letter, while other states require that all patients receive the same notification with information about dense breasts but does not tell them whether or not they have dense breasts.

A go-to resource for ObGyns and patients

The website of the nonprofit DenseBreast-Info.org (http://densebreast-info.org/), co-founded by Wendie Berg, MD, PhD, who serves as Chief Scientific Advisor to the organization and is Professor of Radiology at the University of Pittsburgh School of Medicine/Magee-Women’s Hospital of UPMC, provides an interactive US map that features state-by-state breast density reporting guidelines so you can stay up-to-date on notification legislation in your area.

Sections for patients offer comprehensive and clearly written information on categories of breast density, a patient risk checklist, screening test descriptions, frequently asked questions, educational videos, and a patient brochure in English and Spanish.

For health care providers, resources include:

  • a screening decision support tool flowchart to help assess which patients need more screening
  • a table summarizing the cancer detection rates for mammography alone and mammography plus another screening modality (tomosynthesis, ultrasound, MRI)
  • a comparison of breast cancer screening guidelines from various medical societies, including the American College of Radiology/Society of Breast Imaging, the American Cancer Society, the American College of Obstetricians and Gynecologists, and the US Preventive Services Task Force.

A special section covers screening technology, and each page includes descriptions, benefits, and considerations for use. Photos of the equipment and images of breast scans with explanatory captions enhance understanding.

Screening for high-risk women

Ms. Pushkin noted that for high-risk patients with dense breasts, mammography plus MRI annually would be an appropriate option.

References
  1. Tagliafico AS, Calabrese M, Mariscotti G, et al. Adjunct screening with tomosynthesis or ultrasound in women with mammography-negative dense breasts: interim report of a prospective comparative trial [published online ahead of print March 9, 2015]. J Clin Oncol. doi:10.1200/JCO.2015.63.4147.
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Dr. Saini reports that she is a speaker for GE Healthcare.

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Monica Saini, MD, a radiologist in Santa Fe, New Mexico, and JoAnn Pushkin, executive director of the nonprofit educational website DenseBreast-info.org, engaged ObGyn attendees on “Breast density: Why it matters and what to do” at the American College of Obstetricians and Gynecologists (ACOG) 2017 Annual Clinical and Scientific Meeting (May 6–9, 2017) in San Diego, California. The program was sponsored by GE Healthcare.

DENSE BREASTS ARE A RISK FACTOR FOR CANCER

Breast density is the second largest risk factor for breast cancer after radiation treatment to the chest, so it is important to identify patients with dense breasts, according to Dr. Saini. The American College of Radiology’s Breast Imaging Reporting and Data System (BI-RADS) classifies breast density into 4 groups: 1) almost entirely fatty, 2) scattered fibroglandular densities, 3) heterogeneously dense, and 4) extremely dense. A woman whose mammograms show heterogeneously dense or extremely dense breasts is considered to have “dense breasts.”

Cancer is often difficult to identify with mammography in dense breasts because masses or lumps appear as white on a white (dense tissue) background; by contrast, a tumor in a nondense (fatty) breast would appear as white on a dark, fatty tissue background. Approximately one-third of cancers in dense breasts have a delayed diagnosis on mammography, and 70% of cancers occur in dense breasts, said Dr. Saini.

Having dense breasts is not an abnormal condition, however, and is actually common—about 40% of women aged 40 or older have dense breasts.

Supplement mammography with other screening modalities

While screening mammograms can save lives, mammography should not be viewed as a one-size-fits-all modality. Screening for breast cancer should be personalized, based on, among other factors, a woman’s personal and family history, age, genetic risk, lifestyle factors, and breast density.

Key point. Women with dense breasts should continue to have screening mammograms. In addition, mammography for these patients should be supplemented with other technologies, such as 3D mammography (digital tomosynthesis), handheld ultrasound, or automated breast ultrasound (ABUS). In women at higher risk (presence of BRCA1 or BRCA2 gene mutation, strong family history of breast cancer, or radiation treatment to the chest) magnetic resonance imaging (MRI) may be considered.

Data on adjunct screening modalities. Dr. Saini discussed the results of the ASTOUND trial, a prospective multicenter study that compared ultrasound and tomosynthesis for the detection of breast cancer in mammography-negative dense breasts.1 Among the 3,231 asymptomatic women included in the trial, 13 breast cancers were detected with tomosynthesis (incremental cancer detection rate [CDR], 4 per 1,000 screens; 95% confidence interval [CI], 1.8–6.2) and 23 were detected with ultrasound (incremental CDR, 7.1 per 1,000 screens; 95% CI, 4.4–10.0), P = .006. There were 107 false-positive results: 53 with tomosynthesis and 65 with ultrasound, a difference that was not statistically significant. The study authors noted that while ultrasound had better incremental breast cancer detection than tomosynthesis, and at a similar false-positive recall rate, tomosynthesis did detect more than half of the additional breast cancers in these women.1

Make screening easier for the patient

Dr. Saini noted that for women with dense breasts, performing mammography and adjunctive screening at the same visit is convenient for the patient. Physicians can also write prescriptions for follow-up based on density findings, for example, “3D mammography if available, if dense, order ultrasound.”

Read how to answer patient questions about breast density

 

 

ARE YOU READY TO ANSWER PATIENT QUESTIONS ABOUT BREAST DENSITY?

That is the question JoAnn Pushkin, executive director of DenseBreast-info.org, asked in her presentation. You should discuss with patients exactly what it means to have dense breasts, breast density as an independent risk factor for cancer, the breast imaging technologies available for screening (mammography, tomosynthesis, ultrasound, contrast-enhanced MRI), the risks and benefits of each screening modality, and surveillance intervals for women with dense breasts. Good communication with the patient’s radiology team assists in formulating an individualized screening strategy.

Patients may have concerns about the information provided—or not provided—in their state’s breast density notification letter after a mammogram. Currently, 31 states mandate some type of breast density notification, while 4 states have efforts for density reporting or education that do not require notification. The information given to patients and how they will be informed varies by state. Some states, for example, require that patients who have heterogeneously or extremely dense breasts be informed of this by letter, while other states require that all patients receive the same notification with information about dense breasts but does not tell them whether or not they have dense breasts.

A go-to resource for ObGyns and patients

The website of the nonprofit DenseBreast-Info.org (http://densebreast-info.org/), co-founded by Wendie Berg, MD, PhD, who serves as Chief Scientific Advisor to the organization and is Professor of Radiology at the University of Pittsburgh School of Medicine/Magee-Women’s Hospital of UPMC, provides an interactive US map that features state-by-state breast density reporting guidelines so you can stay up-to-date on notification legislation in your area.

Sections for patients offer comprehensive and clearly written information on categories of breast density, a patient risk checklist, screening test descriptions, frequently asked questions, educational videos, and a patient brochure in English and Spanish.

For health care providers, resources include:

  • a screening decision support tool flowchart to help assess which patients need more screening
  • a table summarizing the cancer detection rates for mammography alone and mammography plus another screening modality (tomosynthesis, ultrasound, MRI)
  • a comparison of breast cancer screening guidelines from various medical societies, including the American College of Radiology/Society of Breast Imaging, the American Cancer Society, the American College of Obstetricians and Gynecologists, and the US Preventive Services Task Force.

A special section covers screening technology, and each page includes descriptions, benefits, and considerations for use. Photos of the equipment and images of breast scans with explanatory captions enhance understanding.

Screening for high-risk women

Ms. Pushkin noted that for high-risk patients with dense breasts, mammography plus MRI annually would be an appropriate option.

Monica Saini, MD, a radiologist in Santa Fe, New Mexico, and JoAnn Pushkin, executive director of the nonprofit educational website DenseBreast-info.org, engaged ObGyn attendees on “Breast density: Why it matters and what to do” at the American College of Obstetricians and Gynecologists (ACOG) 2017 Annual Clinical and Scientific Meeting (May 6–9, 2017) in San Diego, California. The program was sponsored by GE Healthcare.

DENSE BREASTS ARE A RISK FACTOR FOR CANCER

Breast density is the second largest risk factor for breast cancer after radiation treatment to the chest, so it is important to identify patients with dense breasts, according to Dr. Saini. The American College of Radiology’s Breast Imaging Reporting and Data System (BI-RADS) classifies breast density into 4 groups: 1) almost entirely fatty, 2) scattered fibroglandular densities, 3) heterogeneously dense, and 4) extremely dense. A woman whose mammograms show heterogeneously dense or extremely dense breasts is considered to have “dense breasts.”

Cancer is often difficult to identify with mammography in dense breasts because masses or lumps appear as white on a white (dense tissue) background; by contrast, a tumor in a nondense (fatty) breast would appear as white on a dark, fatty tissue background. Approximately one-third of cancers in dense breasts have a delayed diagnosis on mammography, and 70% of cancers occur in dense breasts, said Dr. Saini.

Having dense breasts is not an abnormal condition, however, and is actually common—about 40% of women aged 40 or older have dense breasts.

Supplement mammography with other screening modalities

While screening mammograms can save lives, mammography should not be viewed as a one-size-fits-all modality. Screening for breast cancer should be personalized, based on, among other factors, a woman’s personal and family history, age, genetic risk, lifestyle factors, and breast density.

Key point. Women with dense breasts should continue to have screening mammograms. In addition, mammography for these patients should be supplemented with other technologies, such as 3D mammography (digital tomosynthesis), handheld ultrasound, or automated breast ultrasound (ABUS). In women at higher risk (presence of BRCA1 or BRCA2 gene mutation, strong family history of breast cancer, or radiation treatment to the chest) magnetic resonance imaging (MRI) may be considered.

Data on adjunct screening modalities. Dr. Saini discussed the results of the ASTOUND trial, a prospective multicenter study that compared ultrasound and tomosynthesis for the detection of breast cancer in mammography-negative dense breasts.1 Among the 3,231 asymptomatic women included in the trial, 13 breast cancers were detected with tomosynthesis (incremental cancer detection rate [CDR], 4 per 1,000 screens; 95% confidence interval [CI], 1.8–6.2) and 23 were detected with ultrasound (incremental CDR, 7.1 per 1,000 screens; 95% CI, 4.4–10.0), P = .006. There were 107 false-positive results: 53 with tomosynthesis and 65 with ultrasound, a difference that was not statistically significant. The study authors noted that while ultrasound had better incremental breast cancer detection than tomosynthesis, and at a similar false-positive recall rate, tomosynthesis did detect more than half of the additional breast cancers in these women.1

Make screening easier for the patient

Dr. Saini noted that for women with dense breasts, performing mammography and adjunctive screening at the same visit is convenient for the patient. Physicians can also write prescriptions for follow-up based on density findings, for example, “3D mammography if available, if dense, order ultrasound.”

Read how to answer patient questions about breast density

 

 

ARE YOU READY TO ANSWER PATIENT QUESTIONS ABOUT BREAST DENSITY?

That is the question JoAnn Pushkin, executive director of DenseBreast-info.org, asked in her presentation. You should discuss with patients exactly what it means to have dense breasts, breast density as an independent risk factor for cancer, the breast imaging technologies available for screening (mammography, tomosynthesis, ultrasound, contrast-enhanced MRI), the risks and benefits of each screening modality, and surveillance intervals for women with dense breasts. Good communication with the patient’s radiology team assists in formulating an individualized screening strategy.

Patients may have concerns about the information provided—or not provided—in their state’s breast density notification letter after a mammogram. Currently, 31 states mandate some type of breast density notification, while 4 states have efforts for density reporting or education that do not require notification. The information given to patients and how they will be informed varies by state. Some states, for example, require that patients who have heterogeneously or extremely dense breasts be informed of this by letter, while other states require that all patients receive the same notification with information about dense breasts but does not tell them whether or not they have dense breasts.

A go-to resource for ObGyns and patients

The website of the nonprofit DenseBreast-Info.org (http://densebreast-info.org/), co-founded by Wendie Berg, MD, PhD, who serves as Chief Scientific Advisor to the organization and is Professor of Radiology at the University of Pittsburgh School of Medicine/Magee-Women’s Hospital of UPMC, provides an interactive US map that features state-by-state breast density reporting guidelines so you can stay up-to-date on notification legislation in your area.

Sections for patients offer comprehensive and clearly written information on categories of breast density, a patient risk checklist, screening test descriptions, frequently asked questions, educational videos, and a patient brochure in English and Spanish.

For health care providers, resources include:

  • a screening decision support tool flowchart to help assess which patients need more screening
  • a table summarizing the cancer detection rates for mammography alone and mammography plus another screening modality (tomosynthesis, ultrasound, MRI)
  • a comparison of breast cancer screening guidelines from various medical societies, including the American College of Radiology/Society of Breast Imaging, the American Cancer Society, the American College of Obstetricians and Gynecologists, and the US Preventive Services Task Force.

A special section covers screening technology, and each page includes descriptions, benefits, and considerations for use. Photos of the equipment and images of breast scans with explanatory captions enhance understanding.

Screening for high-risk women

Ms. Pushkin noted that for high-risk patients with dense breasts, mammography plus MRI annually would be an appropriate option.

References
  1. Tagliafico AS, Calabrese M, Mariscotti G, et al. Adjunct screening with tomosynthesis or ultrasound in women with mammography-negative dense breasts: interim report of a prospective comparative trial [published online ahead of print March 9, 2015]. J Clin Oncol. doi:10.1200/JCO.2015.63.4147.
References
  1. Tagliafico AS, Calabrese M, Mariscotti G, et al. Adjunct screening with tomosynthesis or ultrasound in women with mammography-negative dense breasts: interim report of a prospective comparative trial [published online ahead of print March 9, 2015]. J Clin Oncol. doi:10.1200/JCO.2015.63.4147.
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Genes may play role in breast cancer racial disparities

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A new analysis of data from The Cancer Genome Atlas revealed 142 genes differentially expressed between white and African Americans that may influence breast cancer survival.

Dr. Olufunmilayo I. Olopade
“It gives us a road map to begin to dig deeper into solving a lot of the challenges we had had in terms of describing disparities, and what we need to do to move forward,” coauthor Olufunmilayo I. Olopade, MD, professor of medicine and human genetics and director of the center for clinical cancer genetics at the University of Chicago, said in a press statement.

“If you have African ancestry, you’re more likely to have tumors that grow really fast. If we have drugs that can treat that kind of tumor, we need to find you and get you into treatment as quickly as possible,” she said.
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A new analysis of data from The Cancer Genome Atlas revealed 142 genes differentially expressed between white and African Americans that may influence breast cancer survival.

Dr. Olufunmilayo I. Olopade
“It gives us a road map to begin to dig deeper into solving a lot of the challenges we had had in terms of describing disparities, and what we need to do to move forward,” coauthor Olufunmilayo I. Olopade, MD, professor of medicine and human genetics and director of the center for clinical cancer genetics at the University of Chicago, said in a press statement.

“If you have African ancestry, you’re more likely to have tumors that grow really fast. If we have drugs that can treat that kind of tumor, we need to find you and get you into treatment as quickly as possible,” she said.

 

A new analysis of data from The Cancer Genome Atlas revealed 142 genes differentially expressed between white and African Americans that may influence breast cancer survival.

Dr. Olufunmilayo I. Olopade
“It gives us a road map to begin to dig deeper into solving a lot of the challenges we had had in terms of describing disparities, and what we need to do to move forward,” coauthor Olufunmilayo I. Olopade, MD, professor of medicine and human genetics and director of the center for clinical cancer genetics at the University of Chicago, said in a press statement.

“If you have African ancestry, you’re more likely to have tumors that grow really fast. If we have drugs that can treat that kind of tumor, we need to find you and get you into treatment as quickly as possible,” she said.
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Key clinical point: Genetic differences may play role in racial disparities in breast cancer outcomes.

Major finding: The Cancer Genome Atlas data show that 142 genes were differentially expressed between whites and African Americans.

Data source: Analysis of genetic and outcome data from 930 patients.

Disclosures: The study was funded by the National Cancer Institute, the Breast Cancer Research Foundation, the National Human Genome Research Institute, Susan G. Komen, and the American Cancer Society. Dr. Olopade is a cofounder of CancerIQ and Prosigna.

Decision to remove breast cancer metastases depends on location of lesions

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– Determination of whether excision of persistent breast cancer metastases can benefit the patient and even prolong survival depends on the location of the metastatic lesions, an investigator said at the annual meeting of the American Society of Breast Surgeons.

Before making the decision, it’s important to restage the patient’s disease and to recheck the receptor status if a biopsy is accessible, said Roshni Rao, MD, of the University of Texas Southwestern Medical Center.

Brain

Dr. Roshni Rao
Approximately 12% of patients present with the brain as the first site of metastasis, and 54% of patients have multiple brain metastases, most commonly at the cerebellum and frontal lobes.

Survival is worse when there are concurrent extracranial metastases or when brain metastases are greater than 5 cm, in patients with triple negative tumors, and in patients with a Karnofsky score of 70 or less, Dr. Rao said.

Surgery has the greatest benefit in patients with a single metastasis, with no extracranial disease, and who are able to undergo adjuvant whole brain radiation. In these cases, surgery improves survival, lowers recurrence rates, and reduces the risk of death neurological causes, she said.

Long-term survival is most common with continuous adjuvant therapy, either trastuzumab or hormonal, and in patients with a longer time interval to development of metastases. One series showed a 20-month survival increase.

Liver

Approximately 15% of patients with synchronous metastases will have liver metastases, and about half of stage IV patients will experience liver metastases at some point during treatment.

There is evidence from colorectal cancer that removing liver metastases is beneficial, and that has prompted interest in a similar approach in breast cancer. Liver resection has also become safer with new advances.

Dr. Rao discussed a single-institution study which took an aggressive approach to liver resection in 85 patients (Ann Surg. 2006;244:897-907). The researchers found that increased survival was associated with a good response to adjuvant chemotherapy, an r0 or r1 resection, and in patients who had a previous liver resection and were healthy enough to undergo another resection.

Overall, existing studies support liver resection if there are one to three lesions, if negative margins can be achieved, if the tumors are hormone receptor positive, and if the cancer is hormone positive and has good response to chemotherapy.

Dr. Rao emphasized that liver resections should be performed with a multidisciplinary team and should only be attempted at centers with low morbidity and where the doctors are experienced with liver resection.

When it’s possible, liver resection is beneficial. “There have been multiple reports of long-term survivors with no evidence of disease. There is likely a survival benefit with careful selection of these patients,” Dr. Rao said.

Lung

Lung surgeries are becoming safer, especially with the availability of video-assisted techniques, and pulmonary metastases are increasingly being spotted using more sensitive techniques such as higher resolution computed tomography.

A lung metastasis registry analysis showed three factors improved survival: prolonged disease-free survival, especially longer than 36 months; a complete resection; and a small number of metastases and success in resecting them all (Eur J Cardiothorac Surg. 2002;22:335-44). A more recent meta-analysis showed the same results (J Thorac Dis. 2015;7:1441-51).

Bone

Bone metastases remain rare choices for surgical treatment. Most of the time, morbidity will be too high, and there are good options for systemic treatment. That leaves surgery reserved mostly for stabilization or the treatment of fractures.

However, there are a couple of exceptions, according to Dr. Rao. One multi-institutional randomized trial looked at metastatic epidural spinal cord compression. Subjects either underwent decompressive surgery with stabilization and radiation or radiation alone. Patients in the surgical group had a longer ambulatory period and had a lower usage rate of steroids and opioids. Morbidity outcomes were similar in both groups. Patients whose primary tumor was in the breast seemed to benefit the most with respect to ambulatory time (Lancet. 2005;9486:643-8; J Neurosurg Spine. 2008;8:271-8).

Sternal metastases represent another special case. 70% of the time, patients with sternal metastases have it as their only metastatic site. A French series of 33 patients who underwent aggressive chest wall and rib resection reported a 36% complication rate, while another study of 28 patients showed a 21% complication rate. Those complications are a problem, “but if you’re able to perform this in a resected tumor, there are long term survivors. As usual, triple negative breast cancers predicted a worse prognosis,” said Dr. Rao.

Dr. Rao concluded that resection of metastatic sites has a role. “I think it’s our responsibility as breast surgeons who are many times continuously following these patients to consider appropriate operations,” said Dr. Rao.

However, she did sound one note of caution. Surgery can interrupt therapy that is helping a patient. “Let’s say you have someone get a big liver resection, and then they have a tough time with recovery. There could be a long period of time they can’t get the therapy that was keeping them alive. That’s the real concern,” she said.

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– Determination of whether excision of persistent breast cancer metastases can benefit the patient and even prolong survival depends on the location of the metastatic lesions, an investigator said at the annual meeting of the American Society of Breast Surgeons.

Before making the decision, it’s important to restage the patient’s disease and to recheck the receptor status if a biopsy is accessible, said Roshni Rao, MD, of the University of Texas Southwestern Medical Center.

Brain

Dr. Roshni Rao
Approximately 12% of patients present with the brain as the first site of metastasis, and 54% of patients have multiple brain metastases, most commonly at the cerebellum and frontal lobes.

Survival is worse when there are concurrent extracranial metastases or when brain metastases are greater than 5 cm, in patients with triple negative tumors, and in patients with a Karnofsky score of 70 or less, Dr. Rao said.

Surgery has the greatest benefit in patients with a single metastasis, with no extracranial disease, and who are able to undergo adjuvant whole brain radiation. In these cases, surgery improves survival, lowers recurrence rates, and reduces the risk of death neurological causes, she said.

Long-term survival is most common with continuous adjuvant therapy, either trastuzumab or hormonal, and in patients with a longer time interval to development of metastases. One series showed a 20-month survival increase.

Liver

Approximately 15% of patients with synchronous metastases will have liver metastases, and about half of stage IV patients will experience liver metastases at some point during treatment.

There is evidence from colorectal cancer that removing liver metastases is beneficial, and that has prompted interest in a similar approach in breast cancer. Liver resection has also become safer with new advances.

Dr. Rao discussed a single-institution study which took an aggressive approach to liver resection in 85 patients (Ann Surg. 2006;244:897-907). The researchers found that increased survival was associated with a good response to adjuvant chemotherapy, an r0 or r1 resection, and in patients who had a previous liver resection and were healthy enough to undergo another resection.

Overall, existing studies support liver resection if there are one to three lesions, if negative margins can be achieved, if the tumors are hormone receptor positive, and if the cancer is hormone positive and has good response to chemotherapy.

Dr. Rao emphasized that liver resections should be performed with a multidisciplinary team and should only be attempted at centers with low morbidity and where the doctors are experienced with liver resection.

When it’s possible, liver resection is beneficial. “There have been multiple reports of long-term survivors with no evidence of disease. There is likely a survival benefit with careful selection of these patients,” Dr. Rao said.

Lung

Lung surgeries are becoming safer, especially with the availability of video-assisted techniques, and pulmonary metastases are increasingly being spotted using more sensitive techniques such as higher resolution computed tomography.

A lung metastasis registry analysis showed three factors improved survival: prolonged disease-free survival, especially longer than 36 months; a complete resection; and a small number of metastases and success in resecting them all (Eur J Cardiothorac Surg. 2002;22:335-44). A more recent meta-analysis showed the same results (J Thorac Dis. 2015;7:1441-51).

Bone

Bone metastases remain rare choices for surgical treatment. Most of the time, morbidity will be too high, and there are good options for systemic treatment. That leaves surgery reserved mostly for stabilization or the treatment of fractures.

However, there are a couple of exceptions, according to Dr. Rao. One multi-institutional randomized trial looked at metastatic epidural spinal cord compression. Subjects either underwent decompressive surgery with stabilization and radiation or radiation alone. Patients in the surgical group had a longer ambulatory period and had a lower usage rate of steroids and opioids. Morbidity outcomes were similar in both groups. Patients whose primary tumor was in the breast seemed to benefit the most with respect to ambulatory time (Lancet. 2005;9486:643-8; J Neurosurg Spine. 2008;8:271-8).

Sternal metastases represent another special case. 70% of the time, patients with sternal metastases have it as their only metastatic site. A French series of 33 patients who underwent aggressive chest wall and rib resection reported a 36% complication rate, while another study of 28 patients showed a 21% complication rate. Those complications are a problem, “but if you’re able to perform this in a resected tumor, there are long term survivors. As usual, triple negative breast cancers predicted a worse prognosis,” said Dr. Rao.

Dr. Rao concluded that resection of metastatic sites has a role. “I think it’s our responsibility as breast surgeons who are many times continuously following these patients to consider appropriate operations,” said Dr. Rao.

However, she did sound one note of caution. Surgery can interrupt therapy that is helping a patient. “Let’s say you have someone get a big liver resection, and then they have a tough time with recovery. There could be a long period of time they can’t get the therapy that was keeping them alive. That’s the real concern,” she said.

 

– Determination of whether excision of persistent breast cancer metastases can benefit the patient and even prolong survival depends on the location of the metastatic lesions, an investigator said at the annual meeting of the American Society of Breast Surgeons.

Before making the decision, it’s important to restage the patient’s disease and to recheck the receptor status if a biopsy is accessible, said Roshni Rao, MD, of the University of Texas Southwestern Medical Center.

Brain

Dr. Roshni Rao
Approximately 12% of patients present with the brain as the first site of metastasis, and 54% of patients have multiple brain metastases, most commonly at the cerebellum and frontal lobes.

Survival is worse when there are concurrent extracranial metastases or when brain metastases are greater than 5 cm, in patients with triple negative tumors, and in patients with a Karnofsky score of 70 or less, Dr. Rao said.

Surgery has the greatest benefit in patients with a single metastasis, with no extracranial disease, and who are able to undergo adjuvant whole brain radiation. In these cases, surgery improves survival, lowers recurrence rates, and reduces the risk of death neurological causes, she said.

Long-term survival is most common with continuous adjuvant therapy, either trastuzumab or hormonal, and in patients with a longer time interval to development of metastases. One series showed a 20-month survival increase.

Liver

Approximately 15% of patients with synchronous metastases will have liver metastases, and about half of stage IV patients will experience liver metastases at some point during treatment.

There is evidence from colorectal cancer that removing liver metastases is beneficial, and that has prompted interest in a similar approach in breast cancer. Liver resection has also become safer with new advances.

Dr. Rao discussed a single-institution study which took an aggressive approach to liver resection in 85 patients (Ann Surg. 2006;244:897-907). The researchers found that increased survival was associated with a good response to adjuvant chemotherapy, an r0 or r1 resection, and in patients who had a previous liver resection and were healthy enough to undergo another resection.

Overall, existing studies support liver resection if there are one to three lesions, if negative margins can be achieved, if the tumors are hormone receptor positive, and if the cancer is hormone positive and has good response to chemotherapy.

Dr. Rao emphasized that liver resections should be performed with a multidisciplinary team and should only be attempted at centers with low morbidity and where the doctors are experienced with liver resection.

When it’s possible, liver resection is beneficial. “There have been multiple reports of long-term survivors with no evidence of disease. There is likely a survival benefit with careful selection of these patients,” Dr. Rao said.

Lung

Lung surgeries are becoming safer, especially with the availability of video-assisted techniques, and pulmonary metastases are increasingly being spotted using more sensitive techniques such as higher resolution computed tomography.

A lung metastasis registry analysis showed three factors improved survival: prolonged disease-free survival, especially longer than 36 months; a complete resection; and a small number of metastases and success in resecting them all (Eur J Cardiothorac Surg. 2002;22:335-44). A more recent meta-analysis showed the same results (J Thorac Dis. 2015;7:1441-51).

Bone

Bone metastases remain rare choices for surgical treatment. Most of the time, morbidity will be too high, and there are good options for systemic treatment. That leaves surgery reserved mostly for stabilization or the treatment of fractures.

However, there are a couple of exceptions, according to Dr. Rao. One multi-institutional randomized trial looked at metastatic epidural spinal cord compression. Subjects either underwent decompressive surgery with stabilization and radiation or radiation alone. Patients in the surgical group had a longer ambulatory period and had a lower usage rate of steroids and opioids. Morbidity outcomes were similar in both groups. Patients whose primary tumor was in the breast seemed to benefit the most with respect to ambulatory time (Lancet. 2005;9486:643-8; J Neurosurg Spine. 2008;8:271-8).

Sternal metastases represent another special case. 70% of the time, patients with sternal metastases have it as their only metastatic site. A French series of 33 patients who underwent aggressive chest wall and rib resection reported a 36% complication rate, while another study of 28 patients showed a 21% complication rate. Those complications are a problem, “but if you’re able to perform this in a resected tumor, there are long term survivors. As usual, triple negative breast cancers predicted a worse prognosis,” said Dr. Rao.

Dr. Rao concluded that resection of metastatic sites has a role. “I think it’s our responsibility as breast surgeons who are many times continuously following these patients to consider appropriate operations,” said Dr. Rao.

However, she did sound one note of caution. Surgery can interrupt therapy that is helping a patient. “Let’s say you have someone get a big liver resection, and then they have a tough time with recovery. There could be a long period of time they can’t get the therapy that was keeping them alive. That’s the real concern,” she said.

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Androgen receptor screening not ready for triple-negative breast cancer

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– Despite the early promise of antiandrogen therapy, it’s not time yet to routinely screen women with triple-negative breast cancer for androgen receptors, according to Tiffany A. Traina, MD, the head of research into the disease at Memorial Sloan Kettering Cancer Center, New York.

Dr. Tiffany A.Traina
Dr. Traina reviewed the latest findings at the annual meeting of the American Society of Breast Surgeons, but audience members wanted to know if they should be screening triple-negative breast cancers (TNBC) for androgen receptors (ARs).

There’s no standardized test for androgen receptors in breast cancer, so people “are doing different kinds of testing.” In the literature, “the range of AR positivity is anywhere from 12% to 79%, which reflects how we are all over the map in methodology; you might just as well throw a dart at the board. I would encourage screening in the context of the ongoing trials,” Dr. Traina said.

More than a decade ago, Memorial Sloan Kettering found a subset of TNBC that had ARs, which was peculiar because the tumors weren’t otherwise responsive to hormones. Androgen exposure increased growth, but the AR antagonist flutamide (Eulexin)blocked it. “It was thought provoking. There are a lot of drugs in the prostate cancer world” such as flutamide that shut down androgens, she said (Oncogene. 2006 Jun 29;25[28]:3994-4008).

Several have been tried, and investigations are ongoing. The work matters because TNBC is a particularly bad diagnosis. Blocking androgens seems to give some women a few more months of life.

Dr. Traina was the senior author in an early proof-of-concept study for AR blockade that involved 26 women with metastatic TNBC who had been through up to eight prior chemotherapy regimens. The women received 150 mg daily of the prostate cancer AR antagonist bicalutamide (Casodex). Disease remained stable in five (19%) for more than 6 months. Median progression-free survival was 12 weeks, which was “not that far off from what you get with [standard] chemotherapies. This was encouraging, and it led to multiple other trials looking at targeted therapies,” she said (Clin Cancer Res. 2013 Oct 1; 19[19]: 5505-12).

Dr. Traina led a phase II investigation of the prostate cancer AR antagonist enzalutamide (Xtandi) in 118 women with advanced AR-positive TNBC. Her team created an androgen-driven gene signature as a potential biomarker of response. Median progression-free survival was 32 weeks in the 56 women (47%) who were positive for the gene signature, but 9 weeks in those who were not. There were two complete responses and five partial responses with enzalutamide. Currently, “we are looking at using enzalutamide for patients with AR-positive TNBC in the early stage after failure of standard therapies,” she said.

French investigators recently reported a 6-month clinical benefit – including one complete response – in 7 (21%) of 34 women with locally advanced or metastatic TNBC who were treated with 1,000 mg daily of abiraterone acetate (Zytiga), an androgen biosynthesis inhibitor approved for prostate cancer (Ann Oncol. 2016 May;27[5]:812-8).

“We still have a ways to go” before AR treatment reaches the clinic for routine breast cancer treatment, “but there’s reason for hope,” Dr. Traina said.

Dr. Traina reported funding, honoraria, and steering committing payments from a number of companies working on or marketing TNBC AR drugs, including Pfizer, Astellas, Innocrin, AstraZeneca, Eisai, and Merck.
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– Despite the early promise of antiandrogen therapy, it’s not time yet to routinely screen women with triple-negative breast cancer for androgen receptors, according to Tiffany A. Traina, MD, the head of research into the disease at Memorial Sloan Kettering Cancer Center, New York.

Dr. Tiffany A.Traina
Dr. Traina reviewed the latest findings at the annual meeting of the American Society of Breast Surgeons, but audience members wanted to know if they should be screening triple-negative breast cancers (TNBC) for androgen receptors (ARs).

There’s no standardized test for androgen receptors in breast cancer, so people “are doing different kinds of testing.” In the literature, “the range of AR positivity is anywhere from 12% to 79%, which reflects how we are all over the map in methodology; you might just as well throw a dart at the board. I would encourage screening in the context of the ongoing trials,” Dr. Traina said.

More than a decade ago, Memorial Sloan Kettering found a subset of TNBC that had ARs, which was peculiar because the tumors weren’t otherwise responsive to hormones. Androgen exposure increased growth, but the AR antagonist flutamide (Eulexin)blocked it. “It was thought provoking. There are a lot of drugs in the prostate cancer world” such as flutamide that shut down androgens, she said (Oncogene. 2006 Jun 29;25[28]:3994-4008).

Several have been tried, and investigations are ongoing. The work matters because TNBC is a particularly bad diagnosis. Blocking androgens seems to give some women a few more months of life.

Dr. Traina was the senior author in an early proof-of-concept study for AR blockade that involved 26 women with metastatic TNBC who had been through up to eight prior chemotherapy regimens. The women received 150 mg daily of the prostate cancer AR antagonist bicalutamide (Casodex). Disease remained stable in five (19%) for more than 6 months. Median progression-free survival was 12 weeks, which was “not that far off from what you get with [standard] chemotherapies. This was encouraging, and it led to multiple other trials looking at targeted therapies,” she said (Clin Cancer Res. 2013 Oct 1; 19[19]: 5505-12).

Dr. Traina led a phase II investigation of the prostate cancer AR antagonist enzalutamide (Xtandi) in 118 women with advanced AR-positive TNBC. Her team created an androgen-driven gene signature as a potential biomarker of response. Median progression-free survival was 32 weeks in the 56 women (47%) who were positive for the gene signature, but 9 weeks in those who were not. There were two complete responses and five partial responses with enzalutamide. Currently, “we are looking at using enzalutamide for patients with AR-positive TNBC in the early stage after failure of standard therapies,” she said.

French investigators recently reported a 6-month clinical benefit – including one complete response – in 7 (21%) of 34 women with locally advanced or metastatic TNBC who were treated with 1,000 mg daily of abiraterone acetate (Zytiga), an androgen biosynthesis inhibitor approved for prostate cancer (Ann Oncol. 2016 May;27[5]:812-8).

“We still have a ways to go” before AR treatment reaches the clinic for routine breast cancer treatment, “but there’s reason for hope,” Dr. Traina said.

Dr. Traina reported funding, honoraria, and steering committing payments from a number of companies working on or marketing TNBC AR drugs, including Pfizer, Astellas, Innocrin, AstraZeneca, Eisai, and Merck.

 

– Despite the early promise of antiandrogen therapy, it’s not time yet to routinely screen women with triple-negative breast cancer for androgen receptors, according to Tiffany A. Traina, MD, the head of research into the disease at Memorial Sloan Kettering Cancer Center, New York.

Dr. Tiffany A.Traina
Dr. Traina reviewed the latest findings at the annual meeting of the American Society of Breast Surgeons, but audience members wanted to know if they should be screening triple-negative breast cancers (TNBC) for androgen receptors (ARs).

There’s no standardized test for androgen receptors in breast cancer, so people “are doing different kinds of testing.” In the literature, “the range of AR positivity is anywhere from 12% to 79%, which reflects how we are all over the map in methodology; you might just as well throw a dart at the board. I would encourage screening in the context of the ongoing trials,” Dr. Traina said.

More than a decade ago, Memorial Sloan Kettering found a subset of TNBC that had ARs, which was peculiar because the tumors weren’t otherwise responsive to hormones. Androgen exposure increased growth, but the AR antagonist flutamide (Eulexin)blocked it. “It was thought provoking. There are a lot of drugs in the prostate cancer world” such as flutamide that shut down androgens, she said (Oncogene. 2006 Jun 29;25[28]:3994-4008).

Several have been tried, and investigations are ongoing. The work matters because TNBC is a particularly bad diagnosis. Blocking androgens seems to give some women a few more months of life.

Dr. Traina was the senior author in an early proof-of-concept study for AR blockade that involved 26 women with metastatic TNBC who had been through up to eight prior chemotherapy regimens. The women received 150 mg daily of the prostate cancer AR antagonist bicalutamide (Casodex). Disease remained stable in five (19%) for more than 6 months. Median progression-free survival was 12 weeks, which was “not that far off from what you get with [standard] chemotherapies. This was encouraging, and it led to multiple other trials looking at targeted therapies,” she said (Clin Cancer Res. 2013 Oct 1; 19[19]: 5505-12).

Dr. Traina led a phase II investigation of the prostate cancer AR antagonist enzalutamide (Xtandi) in 118 women with advanced AR-positive TNBC. Her team created an androgen-driven gene signature as a potential biomarker of response. Median progression-free survival was 32 weeks in the 56 women (47%) who were positive for the gene signature, but 9 weeks in those who were not. There were two complete responses and five partial responses with enzalutamide. Currently, “we are looking at using enzalutamide for patients with AR-positive TNBC in the early stage after failure of standard therapies,” she said.

French investigators recently reported a 6-month clinical benefit – including one complete response – in 7 (21%) of 34 women with locally advanced or metastatic TNBC who were treated with 1,000 mg daily of abiraterone acetate (Zytiga), an androgen biosynthesis inhibitor approved for prostate cancer (Ann Oncol. 2016 May;27[5]:812-8).

“We still have a ways to go” before AR treatment reaches the clinic for routine breast cancer treatment, “but there’s reason for hope,” Dr. Traina said.

Dr. Traina reported funding, honoraria, and steering committing payments from a number of companies working on or marketing TNBC AR drugs, including Pfizer, Astellas, Innocrin, AstraZeneca, Eisai, and Merck.
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Two new biomarkers show breast cancer validity

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– A pair of breast cancer biomarkers look promising for making better prognosis assessments of selected patients, but acceptance of both into practice will need further documentation of their clinical utility, declared a senior breast cancer oncologist who served as discussant for the studies.

One of the markers is high intratumor heterogeneity of estrogen receptor density, a flag of poor prognosis when heterogeneity is high. The second marker is the phosphorylated signal transducer and activator of transcription (pSTAT) 3, which appeared to link with good prognosis in estrogen receptor–positive breast cancer.

Mitchel L. Zoler/Frontline Medical News
Dr. Sabine C. Linn
Both markers already appear to have analytic and clinical validity based on two independent reports at a breast cancer conference sponsored by the European Society for Medical Oncology, Sabine C. Linn, MD, said as the designated discussant. The data on intratumor estrogen-receptor heterogeneity “is a very intriguing observation. If its validity is confirmed, it would be a very useful assay, with the advantages of being both cheap and not needing additional tests” to confirm a poor prognosis, said Dr. Linn, a professor of medical oncology and specialist in molecular pathology at the Netherlands Cancer Institute. The evidence reported for pSTAT3 showed that expression “strongly correlated with disease-free survival” that could potentially serve as a “warning sign before embarking on STAT3 inhibitor studies in the adjuvant setting,” she suggested.

The data on intratumor estrogen-receptor heterogeneity came from specimens collected from the low-risk breast cancer patients enrolled in the Stockholm Adjuvant Tamoxifen trial during 1976-1990 (Acta Oncol. 2007 July 8;46[2]:133-45). Enrolled patients had lymph node–negative disease and primary tumors smaller than 30 mm. During the trial, researchers preserved formalin-fixed tumor specimens in paraffin from 778 patients, which formed the basis for the current study, explained Linda S. Lindström, PhD, a cancer epidemiologist at the Karolinska Institute in Stockholm. Slides from the specimens were restained for their estrogen receptor content in 2014 and assessed by two independent breast cancer pathologists. They scored the heterogeneity of estrogen receptor distribution as high, medium, or low, and Dr. Lindström and her associates calculated a hazard ratio for 25-year patient survival when they compared 593 specimens with high or low receptor heterogeneity. They adjusted the hazard ratios for several baseline variables including age, year of breast cancer diagnosis, HER2 status, Ki67 status, tumor grade, tumor size, randomization to tamoxifen or placebo treatment, and other factors.

Mitchel L. Zoler/Frontline Medical News
Dr. Linda S. Lindström
The analysis showed that women with high intratumor estrogen receptor heterogeneity had nearly twice the rate of long-term breast cancer–specific death, compared with women who had low receptor heterogeneity (P less than .0001). A second adjusted analysis that focused on specimens from 336 of these women with luminal A tumors showed that high receptor heterogeneity linked with a hazard ratio of 2.4 for long-term cancer-specific death, compared with women with low-heterogeneity tumors (P = .011).

“Routine clinical assessment of intratumor heterogeneity of estrogen receptor may identify patients at high long-term risk for fatal breast cancer that may potentially change clinical management, especially for patients with luminal A subtype tumors,” Dr. Lindström said.“I’d like to see the C statistic; will the prognostic model improve significantly with this added?” Dr. Linn wondered. “We need at least two more independent validations.”

The second biomarker study used two separate analyses of pSTAT3 expression. The first involved specimens collected from 3,074 patients with luminal breast cancer. Analysis of pSTAT3 gene signature expression showed that, the higher the expression levels were, associated with better relapse-free survival during follow-up out to as long as 8 years, reported Amir Sonnenblick, MD, an oncologist at the Sharret Institute of Oncology of Hadassah-Hebrew University Medical Center in Jerusalem.

Mitchel L. Zoler/Frontline Medical News
Dr. Amir Sonnenblick
To confirm and extend this finding, he and his associates used data and specimens collected in the Breast International Group 2-98 phase III trial, which tested the effect of adding docetaxel, either in sequence to or in combination with anthracycline-based adjuvant chemotherapy, in women with node-positive and estrogen receptor–positive breast cancer (Euro J Cancer. 2015 Aug;51[12]:1481-9). The current analysis used 610 tumor specimens from among the 2,173 pathology specimens collected in the study and assessed pSTAT3 protein expression and correlated that with outcomes during a median 10.1-year follow-up. The new pathology review found some level of pSTAT3 in tumor or stroma of 174 (29%) of the 610 specimens examined.

Univariate analysis showed that binary pSTAT3 expression (positive or negative) significantly correlated with 10-year overall survival, with a hazard ratio of 0.66 (P = .04) for patients with positive expression, compared with those with no pSTAT3 expression, Dr. Sonnenblick said.

“pSTAT3 is associated with improved outcome in estrogen receptor–positive breast cancer. Future trials should take pSTAT3 status into account,” he concluded.

Dr. Linn cautioned that pSTAT3 expression should not be used to identify patients who can forgo chemotherapy, as the gene signature expression analysis showed that, even among patients with high pSTAT3 expression, long-term survival was still less than 90%.

Dr. Lindström and Dr. Sonnenblick had no disclosures. Dr. Linn has been an adviser to AstraZeneca, Cergentis, IBM Health, Novartis, Pfizer, Phillips Health, Roche, and Sanofi.
 

 

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– A pair of breast cancer biomarkers look promising for making better prognosis assessments of selected patients, but acceptance of both into practice will need further documentation of their clinical utility, declared a senior breast cancer oncologist who served as discussant for the studies.

One of the markers is high intratumor heterogeneity of estrogen receptor density, a flag of poor prognosis when heterogeneity is high. The second marker is the phosphorylated signal transducer and activator of transcription (pSTAT) 3, which appeared to link with good prognosis in estrogen receptor–positive breast cancer.

Mitchel L. Zoler/Frontline Medical News
Dr. Sabine C. Linn
Both markers already appear to have analytic and clinical validity based on two independent reports at a breast cancer conference sponsored by the European Society for Medical Oncology, Sabine C. Linn, MD, said as the designated discussant. The data on intratumor estrogen-receptor heterogeneity “is a very intriguing observation. If its validity is confirmed, it would be a very useful assay, with the advantages of being both cheap and not needing additional tests” to confirm a poor prognosis, said Dr. Linn, a professor of medical oncology and specialist in molecular pathology at the Netherlands Cancer Institute. The evidence reported for pSTAT3 showed that expression “strongly correlated with disease-free survival” that could potentially serve as a “warning sign before embarking on STAT3 inhibitor studies in the adjuvant setting,” she suggested.

The data on intratumor estrogen-receptor heterogeneity came from specimens collected from the low-risk breast cancer patients enrolled in the Stockholm Adjuvant Tamoxifen trial during 1976-1990 (Acta Oncol. 2007 July 8;46[2]:133-45). Enrolled patients had lymph node–negative disease and primary tumors smaller than 30 mm. During the trial, researchers preserved formalin-fixed tumor specimens in paraffin from 778 patients, which formed the basis for the current study, explained Linda S. Lindström, PhD, a cancer epidemiologist at the Karolinska Institute in Stockholm. Slides from the specimens were restained for their estrogen receptor content in 2014 and assessed by two independent breast cancer pathologists. They scored the heterogeneity of estrogen receptor distribution as high, medium, or low, and Dr. Lindström and her associates calculated a hazard ratio for 25-year patient survival when they compared 593 specimens with high or low receptor heterogeneity. They adjusted the hazard ratios for several baseline variables including age, year of breast cancer diagnosis, HER2 status, Ki67 status, tumor grade, tumor size, randomization to tamoxifen or placebo treatment, and other factors.

Mitchel L. Zoler/Frontline Medical News
Dr. Linda S. Lindström
The analysis showed that women with high intratumor estrogen receptor heterogeneity had nearly twice the rate of long-term breast cancer–specific death, compared with women who had low receptor heterogeneity (P less than .0001). A second adjusted analysis that focused on specimens from 336 of these women with luminal A tumors showed that high receptor heterogeneity linked with a hazard ratio of 2.4 for long-term cancer-specific death, compared with women with low-heterogeneity tumors (P = .011).

“Routine clinical assessment of intratumor heterogeneity of estrogen receptor may identify patients at high long-term risk for fatal breast cancer that may potentially change clinical management, especially for patients with luminal A subtype tumors,” Dr. Lindström said.“I’d like to see the C statistic; will the prognostic model improve significantly with this added?” Dr. Linn wondered. “We need at least two more independent validations.”

The second biomarker study used two separate analyses of pSTAT3 expression. The first involved specimens collected from 3,074 patients with luminal breast cancer. Analysis of pSTAT3 gene signature expression showed that, the higher the expression levels were, associated with better relapse-free survival during follow-up out to as long as 8 years, reported Amir Sonnenblick, MD, an oncologist at the Sharret Institute of Oncology of Hadassah-Hebrew University Medical Center in Jerusalem.

Mitchel L. Zoler/Frontline Medical News
Dr. Amir Sonnenblick
To confirm and extend this finding, he and his associates used data and specimens collected in the Breast International Group 2-98 phase III trial, which tested the effect of adding docetaxel, either in sequence to or in combination with anthracycline-based adjuvant chemotherapy, in women with node-positive and estrogen receptor–positive breast cancer (Euro J Cancer. 2015 Aug;51[12]:1481-9). The current analysis used 610 tumor specimens from among the 2,173 pathology specimens collected in the study and assessed pSTAT3 protein expression and correlated that with outcomes during a median 10.1-year follow-up. The new pathology review found some level of pSTAT3 in tumor or stroma of 174 (29%) of the 610 specimens examined.

Univariate analysis showed that binary pSTAT3 expression (positive or negative) significantly correlated with 10-year overall survival, with a hazard ratio of 0.66 (P = .04) for patients with positive expression, compared with those with no pSTAT3 expression, Dr. Sonnenblick said.

“pSTAT3 is associated with improved outcome in estrogen receptor–positive breast cancer. Future trials should take pSTAT3 status into account,” he concluded.

Dr. Linn cautioned that pSTAT3 expression should not be used to identify patients who can forgo chemotherapy, as the gene signature expression analysis showed that, even among patients with high pSTAT3 expression, long-term survival was still less than 90%.

Dr. Lindström and Dr. Sonnenblick had no disclosures. Dr. Linn has been an adviser to AstraZeneca, Cergentis, IBM Health, Novartis, Pfizer, Phillips Health, Roche, and Sanofi.
 

 

 

– A pair of breast cancer biomarkers look promising for making better prognosis assessments of selected patients, but acceptance of both into practice will need further documentation of their clinical utility, declared a senior breast cancer oncologist who served as discussant for the studies.

One of the markers is high intratumor heterogeneity of estrogen receptor density, a flag of poor prognosis when heterogeneity is high. The second marker is the phosphorylated signal transducer and activator of transcription (pSTAT) 3, which appeared to link with good prognosis in estrogen receptor–positive breast cancer.

Mitchel L. Zoler/Frontline Medical News
Dr. Sabine C. Linn
Both markers already appear to have analytic and clinical validity based on two independent reports at a breast cancer conference sponsored by the European Society for Medical Oncology, Sabine C. Linn, MD, said as the designated discussant. The data on intratumor estrogen-receptor heterogeneity “is a very intriguing observation. If its validity is confirmed, it would be a very useful assay, with the advantages of being both cheap and not needing additional tests” to confirm a poor prognosis, said Dr. Linn, a professor of medical oncology and specialist in molecular pathology at the Netherlands Cancer Institute. The evidence reported for pSTAT3 showed that expression “strongly correlated with disease-free survival” that could potentially serve as a “warning sign before embarking on STAT3 inhibitor studies in the adjuvant setting,” she suggested.

The data on intratumor estrogen-receptor heterogeneity came from specimens collected from the low-risk breast cancer patients enrolled in the Stockholm Adjuvant Tamoxifen trial during 1976-1990 (Acta Oncol. 2007 July 8;46[2]:133-45). Enrolled patients had lymph node–negative disease and primary tumors smaller than 30 mm. During the trial, researchers preserved formalin-fixed tumor specimens in paraffin from 778 patients, which formed the basis for the current study, explained Linda S. Lindström, PhD, a cancer epidemiologist at the Karolinska Institute in Stockholm. Slides from the specimens were restained for their estrogen receptor content in 2014 and assessed by two independent breast cancer pathologists. They scored the heterogeneity of estrogen receptor distribution as high, medium, or low, and Dr. Lindström and her associates calculated a hazard ratio for 25-year patient survival when they compared 593 specimens with high or low receptor heterogeneity. They adjusted the hazard ratios for several baseline variables including age, year of breast cancer diagnosis, HER2 status, Ki67 status, tumor grade, tumor size, randomization to tamoxifen or placebo treatment, and other factors.

Mitchel L. Zoler/Frontline Medical News
Dr. Linda S. Lindström
The analysis showed that women with high intratumor estrogen receptor heterogeneity had nearly twice the rate of long-term breast cancer–specific death, compared with women who had low receptor heterogeneity (P less than .0001). A second adjusted analysis that focused on specimens from 336 of these women with luminal A tumors showed that high receptor heterogeneity linked with a hazard ratio of 2.4 for long-term cancer-specific death, compared with women with low-heterogeneity tumors (P = .011).

“Routine clinical assessment of intratumor heterogeneity of estrogen receptor may identify patients at high long-term risk for fatal breast cancer that may potentially change clinical management, especially for patients with luminal A subtype tumors,” Dr. Lindström said.“I’d like to see the C statistic; will the prognostic model improve significantly with this added?” Dr. Linn wondered. “We need at least two more independent validations.”

The second biomarker study used two separate analyses of pSTAT3 expression. The first involved specimens collected from 3,074 patients with luminal breast cancer. Analysis of pSTAT3 gene signature expression showed that, the higher the expression levels were, associated with better relapse-free survival during follow-up out to as long as 8 years, reported Amir Sonnenblick, MD, an oncologist at the Sharret Institute of Oncology of Hadassah-Hebrew University Medical Center in Jerusalem.

Mitchel L. Zoler/Frontline Medical News
Dr. Amir Sonnenblick
To confirm and extend this finding, he and his associates used data and specimens collected in the Breast International Group 2-98 phase III trial, which tested the effect of adding docetaxel, either in sequence to or in combination with anthracycline-based adjuvant chemotherapy, in women with node-positive and estrogen receptor–positive breast cancer (Euro J Cancer. 2015 Aug;51[12]:1481-9). The current analysis used 610 tumor specimens from among the 2,173 pathology specimens collected in the study and assessed pSTAT3 protein expression and correlated that with outcomes during a median 10.1-year follow-up. The new pathology review found some level of pSTAT3 in tumor or stroma of 174 (29%) of the 610 specimens examined.

Univariate analysis showed that binary pSTAT3 expression (positive or negative) significantly correlated with 10-year overall survival, with a hazard ratio of 0.66 (P = .04) for patients with positive expression, compared with those with no pSTAT3 expression, Dr. Sonnenblick said.

“pSTAT3 is associated with improved outcome in estrogen receptor–positive breast cancer. Future trials should take pSTAT3 status into account,” he concluded.

Dr. Linn cautioned that pSTAT3 expression should not be used to identify patients who can forgo chemotherapy, as the gene signature expression analysis showed that, even among patients with high pSTAT3 expression, long-term survival was still less than 90%.

Dr. Lindström and Dr. Sonnenblick had no disclosures. Dr. Linn has been an adviser to AstraZeneca, Cergentis, IBM Health, Novartis, Pfizer, Phillips Health, Roche, and Sanofi.
 

 

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AT IMPAKT 2017 BREAST CANCER CONFERENCE

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Key clinical point: Intratumor estrogen-receptor heterogeneity and pSTAT3 expression were associated with long-term outcomes in estrogen receptor–positive breast cancer patients.

Major finding: High estrogen-receptor heterogeneity linked with worse outcomes; pSTAT3 expression linked with better outcomes.

Data source: A total of 593 patients enrolled in the Stockholm Adjuvant Tamoxifen trial, and 610 patients enrolled in the Breast International Group 2-98 trial.

Disclosures: Dr. Lindström and Dr. Sonnenblick had no disclosures. Dr. Linn has been an advisor to AstraZeneca, Cergentis, IBM Health, Novartis, Pfizer, Phillips Health, Roche, and Sanofi.

Biomarkers come up empty for ribociclib targeting

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– The inability of researchers to find a biomarker that could flag a subgroup of breast cancer patients with increased responsiveness to ribociclib plus an aromatase inhibitor was “somewhat disappointing,” Philippe Bedard, MD, said at a breast cancer conference sponsored by the European Society for Medical Oncology.

Many patients who are candidates for this combination treatment, approved by the Food and Drug Administration in March 2017 for postmenopausal women with advanced breast cancer that is hormone receptor positive and HER2 negative, could also do just as well on an aromatase inhibitor alone, said Dr. Bedard, of the Princess Margaret Cancer Centre in Toronto.

Mitchel L. Zoler/Frontline Medical News
Dr. Philippe Bedard
“Being able to identify which patients would do well or not do well on the combination could allow us to tailor our treatments to avoid additional toxicity from ribociclib and avoid frequent monitoring of blood counts, as well as avoid additional drug cost,” said Dr. Bedard, designated discussant for the biomarker analysis reported at the meeting. Monotherapy with an aromatase inhibitor such as letrozole (Femara) might also be a more attractive option for women who are minimally symptomatic with an indolent tumor, he noted.

“The only validated marker for response to a cyclin-dependent kinase 4/6 inhibitor [such as ribociclib] is hormone receptor positivity. The bottom line is that you can’t target to a more specific subgroup with a biomarker,” Dr. Bedard said in an interview.

Mitchel L. Zoler/Frontline Medical News
Dr. Fabrice André
The new biomarker analysis of treatment with ribociclib plus letrozole came from an exploratory analysis of data collected in the MONALEESA-2 (Mammary Oncology Assessment of LEE011’s [Ribociclib’s] Efficacy and Safety) trial, which randomized 668 women with recurrent or metastatic hormone receptor positive, HER2 negative breast cancer who had not previously received systemic treatment to either ribociclib plus letrozole or placebo plus letrozole. During 18-month follow-up, progression-free survival on the dual therapy had a hazard ratio of 0.56, compared with that on letrozole alone (P = .00000329 for superiority), the finding that led to FDA approval in March 2017 for using ribociclib (Kisqali) plus letrozole in this patient population (New Engl J Med. 2017 Nov 3;375[18]:1738-48).*

The researchers who ran the study collected tumor specimens at baseline from all participants, and Fabrice André, MD reported results from analyses run for seven different biomarkers. The analysis looked at protein levels for three biomarkers – Rb, Ki67, and p16 – in 479, 463, and 405 patients respectively; messenger RNA levels for CCND1, CDKN2A, and ESR1 in 386 patients; and DNA mutational status for the PIKC3A gene in 573 patients. In all seven cases, responsiveness to ribociclib was roughly similar regardless of protein or RNA expression levels or the type of PIKC3A (wild or mutated) the tumor carried, reported Dr. André of the Gustave Roussy Cancer Institute in Villejuif, France. Additional biomarker studies on the MONALEESA-2 specimens are ongoing, he said.
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– The inability of researchers to find a biomarker that could flag a subgroup of breast cancer patients with increased responsiveness to ribociclib plus an aromatase inhibitor was “somewhat disappointing,” Philippe Bedard, MD, said at a breast cancer conference sponsored by the European Society for Medical Oncology.

Many patients who are candidates for this combination treatment, approved by the Food and Drug Administration in March 2017 for postmenopausal women with advanced breast cancer that is hormone receptor positive and HER2 negative, could also do just as well on an aromatase inhibitor alone, said Dr. Bedard, of the Princess Margaret Cancer Centre in Toronto.

Mitchel L. Zoler/Frontline Medical News
Dr. Philippe Bedard
“Being able to identify which patients would do well or not do well on the combination could allow us to tailor our treatments to avoid additional toxicity from ribociclib and avoid frequent monitoring of blood counts, as well as avoid additional drug cost,” said Dr. Bedard, designated discussant for the biomarker analysis reported at the meeting. Monotherapy with an aromatase inhibitor such as letrozole (Femara) might also be a more attractive option for women who are minimally symptomatic with an indolent tumor, he noted.

“The only validated marker for response to a cyclin-dependent kinase 4/6 inhibitor [such as ribociclib] is hormone receptor positivity. The bottom line is that you can’t target to a more specific subgroup with a biomarker,” Dr. Bedard said in an interview.

Mitchel L. Zoler/Frontline Medical News
Dr. Fabrice André
The new biomarker analysis of treatment with ribociclib plus letrozole came from an exploratory analysis of data collected in the MONALEESA-2 (Mammary Oncology Assessment of LEE011’s [Ribociclib’s] Efficacy and Safety) trial, which randomized 668 women with recurrent or metastatic hormone receptor positive, HER2 negative breast cancer who had not previously received systemic treatment to either ribociclib plus letrozole or placebo plus letrozole. During 18-month follow-up, progression-free survival on the dual therapy had a hazard ratio of 0.56, compared with that on letrozole alone (P = .00000329 for superiority), the finding that led to FDA approval in March 2017 for using ribociclib (Kisqali) plus letrozole in this patient population (New Engl J Med. 2017 Nov 3;375[18]:1738-48).*

The researchers who ran the study collected tumor specimens at baseline from all participants, and Fabrice André, MD reported results from analyses run for seven different biomarkers. The analysis looked at protein levels for three biomarkers – Rb, Ki67, and p16 – in 479, 463, and 405 patients respectively; messenger RNA levels for CCND1, CDKN2A, and ESR1 in 386 patients; and DNA mutational status for the PIKC3A gene in 573 patients. In all seven cases, responsiveness to ribociclib was roughly similar regardless of protein or RNA expression levels or the type of PIKC3A (wild or mutated) the tumor carried, reported Dr. André of the Gustave Roussy Cancer Institute in Villejuif, France. Additional biomarker studies on the MONALEESA-2 specimens are ongoing, he said.

 

– The inability of researchers to find a biomarker that could flag a subgroup of breast cancer patients with increased responsiveness to ribociclib plus an aromatase inhibitor was “somewhat disappointing,” Philippe Bedard, MD, said at a breast cancer conference sponsored by the European Society for Medical Oncology.

Many patients who are candidates for this combination treatment, approved by the Food and Drug Administration in March 2017 for postmenopausal women with advanced breast cancer that is hormone receptor positive and HER2 negative, could also do just as well on an aromatase inhibitor alone, said Dr. Bedard, of the Princess Margaret Cancer Centre in Toronto.

Mitchel L. Zoler/Frontline Medical News
Dr. Philippe Bedard
“Being able to identify which patients would do well or not do well on the combination could allow us to tailor our treatments to avoid additional toxicity from ribociclib and avoid frequent monitoring of blood counts, as well as avoid additional drug cost,” said Dr. Bedard, designated discussant for the biomarker analysis reported at the meeting. Monotherapy with an aromatase inhibitor such as letrozole (Femara) might also be a more attractive option for women who are minimally symptomatic with an indolent tumor, he noted.

“The only validated marker for response to a cyclin-dependent kinase 4/6 inhibitor [such as ribociclib] is hormone receptor positivity. The bottom line is that you can’t target to a more specific subgroup with a biomarker,” Dr. Bedard said in an interview.

Mitchel L. Zoler/Frontline Medical News
Dr. Fabrice André
The new biomarker analysis of treatment with ribociclib plus letrozole came from an exploratory analysis of data collected in the MONALEESA-2 (Mammary Oncology Assessment of LEE011’s [Ribociclib’s] Efficacy and Safety) trial, which randomized 668 women with recurrent or metastatic hormone receptor positive, HER2 negative breast cancer who had not previously received systemic treatment to either ribociclib plus letrozole or placebo plus letrozole. During 18-month follow-up, progression-free survival on the dual therapy had a hazard ratio of 0.56, compared with that on letrozole alone (P = .00000329 for superiority), the finding that led to FDA approval in March 2017 for using ribociclib (Kisqali) plus letrozole in this patient population (New Engl J Med. 2017 Nov 3;375[18]:1738-48).*

The researchers who ran the study collected tumor specimens at baseline from all participants, and Fabrice André, MD reported results from analyses run for seven different biomarkers. The analysis looked at protein levels for three biomarkers – Rb, Ki67, and p16 – in 479, 463, and 405 patients respectively; messenger RNA levels for CCND1, CDKN2A, and ESR1 in 386 patients; and DNA mutational status for the PIKC3A gene in 573 patients. In all seven cases, responsiveness to ribociclib was roughly similar regardless of protein or RNA expression levels or the type of PIKC3A (wild or mutated) the tumor carried, reported Dr. André of the Gustave Roussy Cancer Institute in Villejuif, France. Additional biomarker studies on the MONALEESA-2 specimens are ongoing, he said.
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Key clinical point: An exploratory analysis for biomarker links to ribociclib responsiveness in the MONALEESA-2 trial failed to find any biomarker that flagged better or worse clinical responses to the drug.

Major finding: Hazard ratio benefits from ribociclib plus letrozole, compared with letrozole alone, were similar regardless of the levels of seven biomarkers.

Data source: Exploratory analysis of tumor specimens collected from 668 patients with breast cancer enrolled in the MONALEESA-2 study.

Disclosures: MONALEESA-2 was sponsored by Novartis, the company that markets ribociclib (Kisqali). Dr. Bedard has received honoraria from Novartis, Pfizer, Roche, and Sanofi, and he has received research funding from Novartis and several other companies. Dr. André has received research funding from Novartis, AstraZeneca, Lilly, and Pfizer.

Breast density is no reason to perform MRI

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– In women with higher density (HD) breasts, preoperative MRI revealed more abnormalities than were seen in women with lower density (LD) breasts, but there was no difference in the number of secondary cancers detected or long-term recurrence rates.

Breast density is often cited by radiologists as a reason to conduct a preoperative MRI, but the study suggests that it should not be a driving factor. “It’s a real challenge when our radiologists provide us reports that say, ‘Due to increased density, we recommend MRI,’ because it’s really hard to then disregard that. I think this is very important data,” said Judy Boughey, MD, professor of surgery at the Mayo Clinic, Rochester, MN, who moderated the session at the annual meeting of the American Society of Breast Surgeons where the research was presented.

“MRI is a valuable tool, and we’re still trying to figure out who it should be performed in,” said lead author Sarah McLaughlin, MD, of the Mayo Clinic, Jacksonville, FL, in an interview.

The researchers retrospectively analyzed data from 683 women at their institution who underwent preoperative MRI between 2007 and 2011. They grouped them by mammography results into LD (33%; Breast Imaging–Reporting and Data System density, 1 and 2) and HD (67%; BI-RADS density, 3 and 4).

Patients in the HD group more often had ipsilateral MRI findings (42% vs. 31%; P = .005), but ,of those with MRI findings, a similar number of patients in each group needed a second site biopsy (HD 65% vs. LD 67%; P = .78).

In all patients who had an additional MRI finding, the odds of detecting an additional ipsilateral cancer were not statistically significant between HD (32%) and LD (23%; P = .15) patients.

HD patients were also more likely to have abnormalities in the contralateral breast (25% vs. 14%; P = .009), but there were no statistically significant differences in rates of second-site biopsy recommendations or in the percentages of abnormalities that turned out to be cancerous (HD 6% vs. LD 3%; P = 1.0).

Following MRI, 70% of LD patients expressed a preference for breast-conserving surgery, compared with 53% of HD patients (P = .0001).

Over a median 7 years of follow-up, there was no difference in freedom from recurrence rates between the two groups (91% in LD vs. 90% in HD; P = .57).

“To me, it says that you don’t have to order an MRI just because they have cancer in a high density breast. You can feel reassured by your surgical plan and treatment recommendations based on conventional imaging,” said Dr. McLaughlin.

The researchers can’t determine if having an MRI done increased patient worry and potentially led to the higher rate of mastectomies chosen by women in the HD group. “Is that a result of the MRI? I don’t think we can say that, but there’s this whole other discussion piece that goes into it. You definitely see patients who say, ‘But it found these other things, and I’m going to have a mastectomy.’ So, there’s that patient preference and worry piece,” said Dr. McLaughlin.

The study results should offer some reassurance to patients. “There were no differences in local recurrence rates according to density. Maybe the next angle is allaying some of that fear, because the outcomes were the same. It’s really driven more by tumor biology and multimodality therapy,” said Dr. McLaughlin.

The study doesn’t provide the final word on breast density and MRI, according to Dr. Boughey. “I think this is an area that needs to be studied more with a clinical trial. There are several going on in different countries, and this is an area where we need level 1 data. This study does fit with what many other studies have shown, which is that MRI probably doesn’t have as much benefit as patients believe it does, so our role really is to try to help educate patients.”

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– In women with higher density (HD) breasts, preoperative MRI revealed more abnormalities than were seen in women with lower density (LD) breasts, but there was no difference in the number of secondary cancers detected or long-term recurrence rates.

Breast density is often cited by radiologists as a reason to conduct a preoperative MRI, but the study suggests that it should not be a driving factor. “It’s a real challenge when our radiologists provide us reports that say, ‘Due to increased density, we recommend MRI,’ because it’s really hard to then disregard that. I think this is very important data,” said Judy Boughey, MD, professor of surgery at the Mayo Clinic, Rochester, MN, who moderated the session at the annual meeting of the American Society of Breast Surgeons where the research was presented.

“MRI is a valuable tool, and we’re still trying to figure out who it should be performed in,” said lead author Sarah McLaughlin, MD, of the Mayo Clinic, Jacksonville, FL, in an interview.

The researchers retrospectively analyzed data from 683 women at their institution who underwent preoperative MRI between 2007 and 2011. They grouped them by mammography results into LD (33%; Breast Imaging–Reporting and Data System density, 1 and 2) and HD (67%; BI-RADS density, 3 and 4).

Patients in the HD group more often had ipsilateral MRI findings (42% vs. 31%; P = .005), but ,of those with MRI findings, a similar number of patients in each group needed a second site biopsy (HD 65% vs. LD 67%; P = .78).

In all patients who had an additional MRI finding, the odds of detecting an additional ipsilateral cancer were not statistically significant between HD (32%) and LD (23%; P = .15) patients.

HD patients were also more likely to have abnormalities in the contralateral breast (25% vs. 14%; P = .009), but there were no statistically significant differences in rates of second-site biopsy recommendations or in the percentages of abnormalities that turned out to be cancerous (HD 6% vs. LD 3%; P = 1.0).

Following MRI, 70% of LD patients expressed a preference for breast-conserving surgery, compared with 53% of HD patients (P = .0001).

Over a median 7 years of follow-up, there was no difference in freedom from recurrence rates between the two groups (91% in LD vs. 90% in HD; P = .57).

“To me, it says that you don’t have to order an MRI just because they have cancer in a high density breast. You can feel reassured by your surgical plan and treatment recommendations based on conventional imaging,” said Dr. McLaughlin.

The researchers can’t determine if having an MRI done increased patient worry and potentially led to the higher rate of mastectomies chosen by women in the HD group. “Is that a result of the MRI? I don’t think we can say that, but there’s this whole other discussion piece that goes into it. You definitely see patients who say, ‘But it found these other things, and I’m going to have a mastectomy.’ So, there’s that patient preference and worry piece,” said Dr. McLaughlin.

The study results should offer some reassurance to patients. “There were no differences in local recurrence rates according to density. Maybe the next angle is allaying some of that fear, because the outcomes were the same. It’s really driven more by tumor biology and multimodality therapy,” said Dr. McLaughlin.

The study doesn’t provide the final word on breast density and MRI, according to Dr. Boughey. “I think this is an area that needs to be studied more with a clinical trial. There are several going on in different countries, and this is an area where we need level 1 data. This study does fit with what many other studies have shown, which is that MRI probably doesn’t have as much benefit as patients believe it does, so our role really is to try to help educate patients.”

 

– In women with higher density (HD) breasts, preoperative MRI revealed more abnormalities than were seen in women with lower density (LD) breasts, but there was no difference in the number of secondary cancers detected or long-term recurrence rates.

Breast density is often cited by radiologists as a reason to conduct a preoperative MRI, but the study suggests that it should not be a driving factor. “It’s a real challenge when our radiologists provide us reports that say, ‘Due to increased density, we recommend MRI,’ because it’s really hard to then disregard that. I think this is very important data,” said Judy Boughey, MD, professor of surgery at the Mayo Clinic, Rochester, MN, who moderated the session at the annual meeting of the American Society of Breast Surgeons where the research was presented.

“MRI is a valuable tool, and we’re still trying to figure out who it should be performed in,” said lead author Sarah McLaughlin, MD, of the Mayo Clinic, Jacksonville, FL, in an interview.

The researchers retrospectively analyzed data from 683 women at their institution who underwent preoperative MRI between 2007 and 2011. They grouped them by mammography results into LD (33%; Breast Imaging–Reporting and Data System density, 1 and 2) and HD (67%; BI-RADS density, 3 and 4).

Patients in the HD group more often had ipsilateral MRI findings (42% vs. 31%; P = .005), but ,of those with MRI findings, a similar number of patients in each group needed a second site biopsy (HD 65% vs. LD 67%; P = .78).

In all patients who had an additional MRI finding, the odds of detecting an additional ipsilateral cancer were not statistically significant between HD (32%) and LD (23%; P = .15) patients.

HD patients were also more likely to have abnormalities in the contralateral breast (25% vs. 14%; P = .009), but there were no statistically significant differences in rates of second-site biopsy recommendations or in the percentages of abnormalities that turned out to be cancerous (HD 6% vs. LD 3%; P = 1.0).

Following MRI, 70% of LD patients expressed a preference for breast-conserving surgery, compared with 53% of HD patients (P = .0001).

Over a median 7 years of follow-up, there was no difference in freedom from recurrence rates between the two groups (91% in LD vs. 90% in HD; P = .57).

“To me, it says that you don’t have to order an MRI just because they have cancer in a high density breast. You can feel reassured by your surgical plan and treatment recommendations based on conventional imaging,” said Dr. McLaughlin.

The researchers can’t determine if having an MRI done increased patient worry and potentially led to the higher rate of mastectomies chosen by women in the HD group. “Is that a result of the MRI? I don’t think we can say that, but there’s this whole other discussion piece that goes into it. You definitely see patients who say, ‘But it found these other things, and I’m going to have a mastectomy.’ So, there’s that patient preference and worry piece,” said Dr. McLaughlin.

The study results should offer some reassurance to patients. “There were no differences in local recurrence rates according to density. Maybe the next angle is allaying some of that fear, because the outcomes were the same. It’s really driven more by tumor biology and multimodality therapy,” said Dr. McLaughlin.

The study doesn’t provide the final word on breast density and MRI, according to Dr. Boughey. “I think this is an area that needs to be studied more with a clinical trial. There are several going on in different countries, and this is an area where we need level 1 data. This study does fit with what many other studies have shown, which is that MRI probably doesn’t have as much benefit as patients believe it does, so our role really is to try to help educate patients.”

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Key clinical point: High breast density is probably not cause enough to order preoperative MRI.

Major finding: Freedom from recurrence rates were 90% in high density and 91% in low.

Data source: Retrospective analysis of 683 women at a single institution.

Disclosures: The study was funded internally. Dr. McLaughlin and Dr. Boughey reported having no relevant financial relationships.

Radiation bests mastectomy for occult breast cancer

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– Overall survival was better when women with occult breast cancer had axillary lymph node dissection and radiation, instead of mastectomy, in a database review of 934 cases by the University of Maryland Medical Center, Baltimore, the largest review to date of how best to handle the problem.

Five- and 10-year overall survival was 90.8% and 84.8%, respectively, among the 342 women treated with axillary lymph node dissection (ALND) plus adjuvant radiation, versus 80.0% and 69.8% among the 592 who had ALND and mastectomies, plus or minus radiation, according to an analysis of the National Cancer Database from 2004-2013. The results were presented at the annual meeting of the American Society of Breast Surgeons.

ALND plus radiation was independently associated with overall survival on multivariate analysis (HR 0.51, 95% CI 0.32-0.81, P = .004), and was associated with fewer comorbidities, use of chemotherapy, number of positive nodes, and number of nodes examined, compared with mastectomy.

Women treated with ALND plus radiation “had significantly better overall survival than those treated with mastectomy, even after adjusting for other covariates. We believe the study supports overall use of this treatment approach in patients with occult breast cancer,” said lead investigator, Lindsay Hessler, MD, of University of Maryland, Baltimore.

Dr. Lindsay Hessler


Occult breast cancer – axillary lymph node metastases without clinical or radiologic evidence of a primary breast tumor – is rare and accounted for less than 0.1% of the 2.03 million breast cancer cases in the database. It’s been unclear how best to treat it; most of the previous investigations were small single-center series and case reports.

The only other significant review was smaller, with 750 women in the Surveillance, Epidemiology, and End Results database treated from 1983 to 2006, the “vast majority” before routine use of breast MRI. It showed that “definitive locoregional treatment with either mastectomy or [radiation therapy] improves [overall survival] in patients with occult breast cancer and axillary metastasis who undergo ALND,” but it didn’t suggest which option is best. The National Comprehensive Cancer Network recommends either approach (Cancer. 2010 Sep 1;116[17]:4000-6).

The new University of Maryland findings “confirm that women do not need to have a mastectomy if you can’t find the cancer in their breast. Women do better if you radiate the breast instead of removing it. A lot of academic centers are doing this now, but some people don’t know about it. This needs to be implemented in a more widespread fashion,” said Shelley Hwang, MD, a surgical oncologist at Duke University, Durham, N.C., who moderated Dr. Hessler’s presentation.

Indeed, patients were most likely to be treated with radiation and ALND at an academic center (OR 2.03, 95% CI 1.5-2.74, P less than .001), the only factor on multivariate analysis related to treatment choice.

The review excluded women with only internal mammary lymph node involvement, those with lumpectomies, and women who had less than four nodes recovered on ALND. Mastectomy and radiation patients were similar in nodal stage, race, income, insurance, estrogen receptor status, comorbidities, and year of diagnosis. On pathology, a tumor was found in about a third of the patients who had mastectomies. MRI use and recurrence rates were unavailable in the National Cancer Database.

The findings are subject to all the limits of database reviews, including the possible confounder that women treated at university hospitals might also have had more optimal systemic therapy, as an audience member noted.

The investigators said they had no financial disclosures.
 
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– Overall survival was better when women with occult breast cancer had axillary lymph node dissection and radiation, instead of mastectomy, in a database review of 934 cases by the University of Maryland Medical Center, Baltimore, the largest review to date of how best to handle the problem.

Five- and 10-year overall survival was 90.8% and 84.8%, respectively, among the 342 women treated with axillary lymph node dissection (ALND) plus adjuvant radiation, versus 80.0% and 69.8% among the 592 who had ALND and mastectomies, plus or minus radiation, according to an analysis of the National Cancer Database from 2004-2013. The results were presented at the annual meeting of the American Society of Breast Surgeons.

ALND plus radiation was independently associated with overall survival on multivariate analysis (HR 0.51, 95% CI 0.32-0.81, P = .004), and was associated with fewer comorbidities, use of chemotherapy, number of positive nodes, and number of nodes examined, compared with mastectomy.

Women treated with ALND plus radiation “had significantly better overall survival than those treated with mastectomy, even after adjusting for other covariates. We believe the study supports overall use of this treatment approach in patients with occult breast cancer,” said lead investigator, Lindsay Hessler, MD, of University of Maryland, Baltimore.

Dr. Lindsay Hessler


Occult breast cancer – axillary lymph node metastases without clinical or radiologic evidence of a primary breast tumor – is rare and accounted for less than 0.1% of the 2.03 million breast cancer cases in the database. It’s been unclear how best to treat it; most of the previous investigations were small single-center series and case reports.

The only other significant review was smaller, with 750 women in the Surveillance, Epidemiology, and End Results database treated from 1983 to 2006, the “vast majority” before routine use of breast MRI. It showed that “definitive locoregional treatment with either mastectomy or [radiation therapy] improves [overall survival] in patients with occult breast cancer and axillary metastasis who undergo ALND,” but it didn’t suggest which option is best. The National Comprehensive Cancer Network recommends either approach (Cancer. 2010 Sep 1;116[17]:4000-6).

The new University of Maryland findings “confirm that women do not need to have a mastectomy if you can’t find the cancer in their breast. Women do better if you radiate the breast instead of removing it. A lot of academic centers are doing this now, but some people don’t know about it. This needs to be implemented in a more widespread fashion,” said Shelley Hwang, MD, a surgical oncologist at Duke University, Durham, N.C., who moderated Dr. Hessler’s presentation.

Indeed, patients were most likely to be treated with radiation and ALND at an academic center (OR 2.03, 95% CI 1.5-2.74, P less than .001), the only factor on multivariate analysis related to treatment choice.

The review excluded women with only internal mammary lymph node involvement, those with lumpectomies, and women who had less than four nodes recovered on ALND. Mastectomy and radiation patients were similar in nodal stage, race, income, insurance, estrogen receptor status, comorbidities, and year of diagnosis. On pathology, a tumor was found in about a third of the patients who had mastectomies. MRI use and recurrence rates were unavailable in the National Cancer Database.

The findings are subject to all the limits of database reviews, including the possible confounder that women treated at university hospitals might also have had more optimal systemic therapy, as an audience member noted.

The investigators said they had no financial disclosures.
 

 

– Overall survival was better when women with occult breast cancer had axillary lymph node dissection and radiation, instead of mastectomy, in a database review of 934 cases by the University of Maryland Medical Center, Baltimore, the largest review to date of how best to handle the problem.

Five- and 10-year overall survival was 90.8% and 84.8%, respectively, among the 342 women treated with axillary lymph node dissection (ALND) plus adjuvant radiation, versus 80.0% and 69.8% among the 592 who had ALND and mastectomies, plus or minus radiation, according to an analysis of the National Cancer Database from 2004-2013. The results were presented at the annual meeting of the American Society of Breast Surgeons.

ALND plus radiation was independently associated with overall survival on multivariate analysis (HR 0.51, 95% CI 0.32-0.81, P = .004), and was associated with fewer comorbidities, use of chemotherapy, number of positive nodes, and number of nodes examined, compared with mastectomy.

Women treated with ALND plus radiation “had significantly better overall survival than those treated with mastectomy, even after adjusting for other covariates. We believe the study supports overall use of this treatment approach in patients with occult breast cancer,” said lead investigator, Lindsay Hessler, MD, of University of Maryland, Baltimore.

Dr. Lindsay Hessler


Occult breast cancer – axillary lymph node metastases without clinical or radiologic evidence of a primary breast tumor – is rare and accounted for less than 0.1% of the 2.03 million breast cancer cases in the database. It’s been unclear how best to treat it; most of the previous investigations were small single-center series and case reports.

The only other significant review was smaller, with 750 women in the Surveillance, Epidemiology, and End Results database treated from 1983 to 2006, the “vast majority” before routine use of breast MRI. It showed that “definitive locoregional treatment with either mastectomy or [radiation therapy] improves [overall survival] in patients with occult breast cancer and axillary metastasis who undergo ALND,” but it didn’t suggest which option is best. The National Comprehensive Cancer Network recommends either approach (Cancer. 2010 Sep 1;116[17]:4000-6).

The new University of Maryland findings “confirm that women do not need to have a mastectomy if you can’t find the cancer in their breast. Women do better if you radiate the breast instead of removing it. A lot of academic centers are doing this now, but some people don’t know about it. This needs to be implemented in a more widespread fashion,” said Shelley Hwang, MD, a surgical oncologist at Duke University, Durham, N.C., who moderated Dr. Hessler’s presentation.

Indeed, patients were most likely to be treated with radiation and ALND at an academic center (OR 2.03, 95% CI 1.5-2.74, P less than .001), the only factor on multivariate analysis related to treatment choice.

The review excluded women with only internal mammary lymph node involvement, those with lumpectomies, and women who had less than four nodes recovered on ALND. Mastectomy and radiation patients were similar in nodal stage, race, income, insurance, estrogen receptor status, comorbidities, and year of diagnosis. On pathology, a tumor was found in about a third of the patients who had mastectomies. MRI use and recurrence rates were unavailable in the National Cancer Database.

The findings are subject to all the limits of database reviews, including the possible confounder that women treated at university hospitals might also have had more optimal systemic therapy, as an audience member noted.

The investigators said they had no financial disclosures.
 
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Key clinical point: Overall survival is better when women with occult breast cancer have axillary lymph node dissection and radiation, instead of mastectomy.

Major finding: Five- and 10-year overall survival was 90.8% and 84.8%, respectively, among the 342 women treated with axillary lymph node dissection (ALND) plus adjuvant radiation, versus 80.0% and 69.8% among the 592 who had ALND and mastectomies, plus or minus radiation.

Data source: Review of 934 cases in the National Cancer Database.

Disclosures: The investigators said they had no financial disclosures.

Mastectomy unnecessary for some breast cancer recurrences

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– Although mastectomy is the standard of care for tumor recurrence following lumpectomy and whole breast irradiation, a second lumpectomy with partial breast irradiation is a sound alternative under certain circumstances, according to Manjeet Chadha, MD, professor of radiation oncology and director of the department of radiation oncology at Icahn School of Medicine at Mount Sinai, New York.

It depends on whether the new lesion is a true recurrence, or simply another primary tumor. In the absence of a genetic footprint to compare the two, Dr. Chadha and her colleagues use several of what she called “soft criteria” to make the call and counsel women.

Dr. Manjeet Chadha


True ipsilateral recurrence of an aggressive tumor tends to happen early, and in the same quadrant. However, if breast cancer recurs more than 3 years after treatment of the primary tumor and in a different quadrant, and if the patient is negative for BRCA mutation, and if the new growth is small, localized on MRI, histologically different from the primary tumor, and likely to be resected with clean margins, Dr. Chadha said she is comfortable offering a second lumpectomy and partial breast radiation – usually multicatheter brachytherapy – to women who do not want a mastectomy.

“Second cancer in a previously irradiated breast is not an uncommon clinical entity. Based on patient preference, the option of repeat breast conservation and reirradiation may be offered selectively as an alternative to mastectomy,” followed by systemic therapy, she said at the annual meeting of the American Society of Breast Surgeons.

“I think all of us across the country are discussing presentations like this in tumor boards,” but it’s not always offered as an option. Sometimes, “the mindset of the treating surgeon is ‘oh, this breast has had radiation; I can’t give radiation again.’ Clearly, whole breast reirradiation is not recommended,” but it seems possible based on a growing body of literature to differentiate new primaries with new biology from true recurrences, and to treat them safely with breast conserving surgery and partial irradiation, she said.

The largest series to date of salvage lumpectomy with multicatheter brachytherapy followed 217 women for a median of 3.9 years. Median tumor size was 1.2 cm. The 5-year local control rate – effectively, the mastectomy-free survival – was 94.4%, and the overall survival was 88.7%, which mirrors the success of first-time lumpectomy with whole breast irradiation, and lends support to the notion that some recurrences are, in fact, entirely new disease. The European team reported excellent or good cosmetic results in 85% of women (Radiother Oncol. 2013 Aug;108[2]:226-31).

The series used high-dose radiation. Dr. Chadha said she and her colleagues have had similar success with low-dose multicatheter brachytherapy, with similarly good aesthetic results. To avoid cosmetic impact, however, she noted it’s important to work with radiation oncologists “mindful of the nuances of what’s needed,” including how far to separate the skin from the radiation.

Brachytherapy has the most support in the literature, but external beam therapy is also an option. “Whatever technique you use, the delineation of the target and the geometric coverage of the lumpectomy cavity [must be] complete in all cases,” she said.

Dr. Chadha had no financial conflicts of interest.
 
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– Although mastectomy is the standard of care for tumor recurrence following lumpectomy and whole breast irradiation, a second lumpectomy with partial breast irradiation is a sound alternative under certain circumstances, according to Manjeet Chadha, MD, professor of radiation oncology and director of the department of radiation oncology at Icahn School of Medicine at Mount Sinai, New York.

It depends on whether the new lesion is a true recurrence, or simply another primary tumor. In the absence of a genetic footprint to compare the two, Dr. Chadha and her colleagues use several of what she called “soft criteria” to make the call and counsel women.

Dr. Manjeet Chadha


True ipsilateral recurrence of an aggressive tumor tends to happen early, and in the same quadrant. However, if breast cancer recurs more than 3 years after treatment of the primary tumor and in a different quadrant, and if the patient is negative for BRCA mutation, and if the new growth is small, localized on MRI, histologically different from the primary tumor, and likely to be resected with clean margins, Dr. Chadha said she is comfortable offering a second lumpectomy and partial breast radiation – usually multicatheter brachytherapy – to women who do not want a mastectomy.

“Second cancer in a previously irradiated breast is not an uncommon clinical entity. Based on patient preference, the option of repeat breast conservation and reirradiation may be offered selectively as an alternative to mastectomy,” followed by systemic therapy, she said at the annual meeting of the American Society of Breast Surgeons.

“I think all of us across the country are discussing presentations like this in tumor boards,” but it’s not always offered as an option. Sometimes, “the mindset of the treating surgeon is ‘oh, this breast has had radiation; I can’t give radiation again.’ Clearly, whole breast reirradiation is not recommended,” but it seems possible based on a growing body of literature to differentiate new primaries with new biology from true recurrences, and to treat them safely with breast conserving surgery and partial irradiation, she said.

The largest series to date of salvage lumpectomy with multicatheter brachytherapy followed 217 women for a median of 3.9 years. Median tumor size was 1.2 cm. The 5-year local control rate – effectively, the mastectomy-free survival – was 94.4%, and the overall survival was 88.7%, which mirrors the success of first-time lumpectomy with whole breast irradiation, and lends support to the notion that some recurrences are, in fact, entirely new disease. The European team reported excellent or good cosmetic results in 85% of women (Radiother Oncol. 2013 Aug;108[2]:226-31).

The series used high-dose radiation. Dr. Chadha said she and her colleagues have had similar success with low-dose multicatheter brachytherapy, with similarly good aesthetic results. To avoid cosmetic impact, however, she noted it’s important to work with radiation oncologists “mindful of the nuances of what’s needed,” including how far to separate the skin from the radiation.

Brachytherapy has the most support in the literature, but external beam therapy is also an option. “Whatever technique you use, the delineation of the target and the geometric coverage of the lumpectomy cavity [must be] complete in all cases,” she said.

Dr. Chadha had no financial conflicts of interest.
 

 

– Although mastectomy is the standard of care for tumor recurrence following lumpectomy and whole breast irradiation, a second lumpectomy with partial breast irradiation is a sound alternative under certain circumstances, according to Manjeet Chadha, MD, professor of radiation oncology and director of the department of radiation oncology at Icahn School of Medicine at Mount Sinai, New York.

It depends on whether the new lesion is a true recurrence, or simply another primary tumor. In the absence of a genetic footprint to compare the two, Dr. Chadha and her colleagues use several of what she called “soft criteria” to make the call and counsel women.

Dr. Manjeet Chadha


True ipsilateral recurrence of an aggressive tumor tends to happen early, and in the same quadrant. However, if breast cancer recurs more than 3 years after treatment of the primary tumor and in a different quadrant, and if the patient is negative for BRCA mutation, and if the new growth is small, localized on MRI, histologically different from the primary tumor, and likely to be resected with clean margins, Dr. Chadha said she is comfortable offering a second lumpectomy and partial breast radiation – usually multicatheter brachytherapy – to women who do not want a mastectomy.

“Second cancer in a previously irradiated breast is not an uncommon clinical entity. Based on patient preference, the option of repeat breast conservation and reirradiation may be offered selectively as an alternative to mastectomy,” followed by systemic therapy, she said at the annual meeting of the American Society of Breast Surgeons.

“I think all of us across the country are discussing presentations like this in tumor boards,” but it’s not always offered as an option. Sometimes, “the mindset of the treating surgeon is ‘oh, this breast has had radiation; I can’t give radiation again.’ Clearly, whole breast reirradiation is not recommended,” but it seems possible based on a growing body of literature to differentiate new primaries with new biology from true recurrences, and to treat them safely with breast conserving surgery and partial irradiation, she said.

The largest series to date of salvage lumpectomy with multicatheter brachytherapy followed 217 women for a median of 3.9 years. Median tumor size was 1.2 cm. The 5-year local control rate – effectively, the mastectomy-free survival – was 94.4%, and the overall survival was 88.7%, which mirrors the success of first-time lumpectomy with whole breast irradiation, and lends support to the notion that some recurrences are, in fact, entirely new disease. The European team reported excellent or good cosmetic results in 85% of women (Radiother Oncol. 2013 Aug;108[2]:226-31).

The series used high-dose radiation. Dr. Chadha said she and her colleagues have had similar success with low-dose multicatheter brachytherapy, with similarly good aesthetic results. To avoid cosmetic impact, however, she noted it’s important to work with radiation oncologists “mindful of the nuances of what’s needed,” including how far to separate the skin from the radiation.

Brachytherapy has the most support in the literature, but external beam therapy is also an option. “Whatever technique you use, the delineation of the target and the geometric coverage of the lumpectomy cavity [must be] complete in all cases,” she said.

Dr. Chadha had no financial conflicts of interest.
 
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EXPERT ANALYSIS FROM ASBS 2017

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Sutureless, guided lumpectomy produced clean margins in majority

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– An automated, minimally invasive, stereotactic-guided lumpectomy performed well in an outpatient setting, with no sutures required, potentially decreasing patient morbidity, according to Pat Whitworth, MD.

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– An automated, minimally invasive, stereotactic-guided lumpectomy performed well in an outpatient setting, with no sutures required, potentially decreasing patient morbidity, according to Pat Whitworth, MD.

 

– An automated, minimally invasive, stereotactic-guided lumpectomy performed well in an outpatient setting, with no sutures required, potentially decreasing patient morbidity, according to Pat Whitworth, MD.

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AT ASBS 2017

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Key clinical point: The technique could replace standard lumpectomy in patients at high surgical risk.

Major finding: Clean margins were obtained in 102 of 125 women with diagnosed cancer.

Data source: A retrospective analysis of 279 patients.

Disclosures: The study was funded by Medtronic, which markets the technology. Dr. Whitworth is a principal at Targeted Medical Education, which receives funding from Medtronic.