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ER-positive is one of the Receptor statuses identified in the classification of breast cancer.Receptor status was traditionally considered by reviewing each individual receptor (ER, PR, her2) in turn, but newer approaches look at these together, along with the tumor grade, to categorize breast cancer into several conceptual molecular classes [1] that have different prognoses [2] and may have ...
Luminal A (ER and/or PR positive; HER2 negative) Luminal B (ER and/or PR positive; HER2 positive) HER2-enriched (ER/PR negative; HER2 positive) Basal like (triple negative). [6] Additionally, cancers can be ER-/PR+ or ER+/PR-, but these are unnamed and relatively rare. [7] The receptor status of a cancer is assessed for all breast cancers as it ...
HER2-low has some HER2 proteins on the cell surface, but not enough to be classified as HER2-positive. [4] 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.
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.
HER2 is a member of the human epidermal growth factor receptor (HER/EGFR/ERBB) family. But contrary to other members of the ERBB family, HER2 does not directly bind ligand. HER2 activation results from heterodimerization with another ERBB member or by homodimerization when HER2 concentration are high, for instance in cancer. [8]
MammaPrint has been prospectively, clinically validated for use in early stage (I and II) breast cancer patients regardless of estrogen receptor (ER) or Human Epidermal Growth Factor Receptor 2 (HER2) status, with a tumor size ≤ 5.0 cm, and 0-3 positive lymph nodes (LN0-1), with no special specifications for N1mi pathology.
It is immunologically typically triple-negative, with negative estrogen receptors (ER), negative progesterone receptors (PR), and negative HER2/neu receptors. [3] There are also medullary breast carcinomas that are found to be estrogen receptors (ER) and/or progesterone receptor (PR) positive, making diagnosis less straightforward.
Triple-negative breast cancer (TNBC) is any breast cancer that either lacks or shows low levels of estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor 2 (HER2) overexpression and/or gene amplification (i.e. the tumor is negative on all three tests giving the name triple-negative). [1]
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