Breast Cancer

Triple-negative breast cancer is considered one of the most difficult to treat breast cancers, with few treatment options, but finally a breakthrough study shows progress by extending patient survival.
Recent results with the investigational targeted therapy alpelisib, a PI3K inhibitor, showed impressive clinical benefits. Adding alpelisib to fulvestrant (Faslodex) extended progression-free survival (PFS) compared with endocrine therapy alone in patients with hormone receptor (HR)–positive, HER2-negative advanced breast cancer characterized by a PIK3CA mutation.
The large, randomized TAM-01 clinical trial demonstrated that 5 mg daily of tamoxifen for 3 years halved the risk for recurrence of breast intraepithelial neoplasia—atypical ductal hyperplasia, ductal carcinoma in situ (DCIS), and lobular carcinoma in situ—in women after surgery and reduced the risk for new contralateral breast cancer by 75% compared with placebo.
Analysis of a phase 3 clinical trial showed that 6 months of trastuzumab was noninferior to 12 months in terms of disease-free survival, and was also associated with a 50% reduction in cardiotoxicity.

The novel drug sacituzumab govitecan is showing significant promise in HER2-negative breast cancers. “The benefit was durable, with an estimated medical duration of response of 7.4 months,” reported Aditya Bardia, MD, MPH.

A new study presented at the 2018 American Association for Cancer Research meeting suggests that HER2 mutations can be acquired during metastatic cancer and their development represents a previously unreported mechanism of resistance to treatment.
A new study presented at the 2018 American Association for Cancer Research meeting suggests that HER2 mutations can be acquired during metastatic cancer and their development represents a previously unreported mechanism of resistance to treatment.
Dr Thomas Bachelot is careful to set reasonable expectations for his patients with HR+/HER2- metastatic breast cancer regarding how long their treatment will last and how it will impact them.
Hope Rugo, MD, discusses common presenting symptoms of HR+/HER2- metastatic breast cancer, citing bone metastasis as the most prevalent.
Breast cancer is one of the most common cancer diagnoses in the United States. The National Cancer Institute estimates that 252,710 American women will be diagnosed with breast cancer and 40,610 will die from the disease in 2017. For the majority (62%) of women with breast cancer, the disease is confined to the breast, and the 5-year survival approaches 100%. However, for women with metastatic disease, the likelihood of survival at 5 years drops to 27%.
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