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Amplification, also known as the over-expression of the ERBB2 gene, occurs in approximately 15-30% of breast cancers. [9] [17] HER2-positive breast cancers are well established as being associated with increased disease recurrence and a poor prognosis compared with other identifiably genetically distinct breast cancers with other known, or lack ...
[19] [20] Trastuzumab, the first HER2-targeted drug developed in 1990, interferes with HER2 signalling. In 2001, a study showed that adding trastuzumab to chemotherapy improved overall survival in women with HER2-positive metastatic breast cancer. [21] Then, in 2005, it was shown that trastuzumab is effective as an adjuvant treatment in women ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 January 2025. Cancer that originates in mammary glands Medical condition Breast cancer An illustration of breast cancer Specialty Surgical Oncology Symptoms A lump in a breast, a change in breast shape, dimpling of the skin, fluid from the nipple, a newly inverted nipple, a red scaly patch of skin on ...
Trastuzumab deruxtecan is the first approved therapy by the US Food and Drug Administration (FDA) targeted to people with the HER2-low breast cancer subtype. [4] DNA-based classification. Understanding the specific details of a particular breast cancer may include looking at the cancer cell DNA or RNA by several different laboratory approaches ...
In early-stage HER2-positive breast cancer, trastuzumab-containing regimens improved overall survival (Hazard ratio (HR) = 0.66) and disease-free survival (HR = 0.60). [38] Increased risk of heart failure (RR = 5.11) and decline in left ventricular ejection fraction ( relative risk RR = 1.83) were seen in these trials as well. [ 38 ]
Staging breast cancer is the initial step to help physicians determine the most appropriate course of treatment. As of 2016, guidelines incorporated biologic factors, such as tumor grade, cellular proliferation rate, estrogen and progesterone receptor expression, human epidermal growth factor 2 (HER2) expression, and gene expression profiling into the staging system.
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