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Second-most common breast cancer subtype may benefit from personalized treatment approach
Date:2/25/2014

PITTSBURGH, Feb. 26, 2014 The second-most common type of breast cancer is a very different disease than the most common and appears to be a good candidate for a personalized approach to treatment, according to a multidisciplinary team led by University of Pittsburgh Cancer Institute (UPCI) scientists.

Invasive lobular carcinoma, which is characterized by a unique growth pattern in breast tissue that fails to form a lump, has distinct genetic markers that indicate there may be benefits from drug therapies beyond those typically prescribed for the more common invasive ductal carcinoma. The results will be published in the March 1 issue of the journal Cancer Research.

Patients with invasive lobular carcinoma are typically treated through surgical removal of the cancer, followed by chemotherapy or hormone therapy or both, usually with the estrogen-mimicking drug tamoxifen or estrogen-lowering aromatase inhibitors, the same as patients with invasive ductal carcinoma.

"However, recent analyses have shown that a subset of patients with lobular carcinoma receive less benefit from adjuvant tamoxifen than patients with ductal carcinoma," said senior author Steffi Oesterreich, Ph.D., professor at UPCI, a partner with UPMC CancerCenter, and director of education at the Women's Cancer Research Center. "Our study, the largest of its kind, indicates an issue with the estrogen receptors inside lobular carcinoma cells and points to a potential target for drug therapy in future clinical trials, which we are developing."

The UPCI study, funded by the Breast Cancer Research Foundation and the U.S. Department of Defense, included collaborations across multiple disciplines, ranging from biostatistics and biomedical informatics to pathology and human genetics, in order to produce results with the potential for rapid translation into clinical therapies.

"In addition to its potential clinical implications, the study highlights the need for more and bette
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Contact: Allison Hydzik
hydzikam@upmc.edu
412-647-9975
University of Pittsburgh Schools of the Health Sciences
Source:Eurekalert  

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