HER2-Positive Breast Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A biologic subset of breast carcinoma defined by high expression of HER2, GRB7, and TRAP100, and by lack of expression of estrogen receptor (ER).

**Synonyms:** - ERBB2 Overexpressing Subtype of Breast Carcinoma - HER2 Overexpressing Breast Carcinoma - HER2 Overexpressing Subtype of Breast Carcinoma - HER2 Positive Breast Cancer - HER2 Positive Breast Carcinoma