Breast Cancer

Results of this real-world study demonstrated that the impact of abemaciclib complements the pivotal clinical trial data.
Thrombotic event incidence was higher in this real-world study than that which was reported in clinical trials, with arterial thrombosis accounting for more than one-third of events.
Early locoregional therapy with surgery and radiation does not improve overall survival (OS) in women with newly diagnosed stage IV breast cancer and an intact primary tumor compared with systemic therapy alone, according to the results of the randomized ECOG-ACRIN E2108 phase 3 clinical trial.
Pembrolizumab (Keytruda) in combination with chemotherapy demonstrated a statistically significant and clinically meaningful improvement in progression-free survival (PFS) compared with chemotherapy alone as a first-line treatment for patients with metastatic triple-negative breast cancer (TNBC) whose tumors express PD-L1.
San Antonio, TX—Although capecitabine (Xeloda) is approved for metasta­tic breast cancer, it is not clear whether it should be used in early breast cancer, and its optimal role remains to be established.
Barcelona, Spain—Late-breaking data from 2 clinical trials presented at ESMO 2019 will likely change the treatment paradigm for pre- or postmenopausal women with hormone receptor (HR)-positive, HER2-negative breast cancer, regardless of menopausal status. The MONALEESA-3 study and the MONARCH-2 study showed an improved overall survival (OS) with the addition of the CDK4/6 inhibitor ribociclib (Kisqali) or abemaciclib (Verzenio) to endocrine therapy as first- or second-line therapy. The results were presented at the Presidential Session of the meeting.
The past week in oncology-related news includes shortages of crucial pediatric cancer drug, results of a study of racial disparities in multiple myeloma, and new drug on the horizon for HER2 metastatic breast cancer.
Two human genes, BRCA1 and BRCA2 (BRCA1/2), produce proteins that block the growth of cancer, such as breast or ovarian cancer. These proteins ensure the stability of each cell’s genetic material and help to repair damaged DNA. A mutation in either BRCA results in these proteins not functioning correctly. Specifically, DNA damage may not be repaired effectively, which can lead to cancer.
On May 3, 2019, the US Food and Drug Administration (FDA) approved ado-trastuzumab emtansine (Kadcyla; Genentech) for the adjuvant treatment of patients with HER2-positive early breast cancer who have residual invasive disease after neoadjuvant taxane and trastuzumab-based treatment. Patients should be selected for treatment with this agent based on an FDA-approved companion diagnostic test (Ventana Medical System’s PATHWAY anti-HER-2/neu [4B5] Rabbit Monoclonal Primary Antibody assay or INFORM HER2 Dual ISH DNA Probe Cocktail assay).
Options for the treatment of patients with advanced hormone receptor (HR)-positive, HER2-­negative breast cancer are expanding. The updated National Comprehensive Cancer Network (NCCN) guideline (version 1.2019) for the management of invasive breast cancer is focused on HR-positive, HER2-­negative disease.
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