invasive ductal breast carcinoma basal-like breast carcinoma A biologic subset of breast carcinoma defined by high expression of genes characteristic of basal epithelial cells, including KRT5 and KRT17, annexin 8, CX3CL1, and TRIM29, and usually by lack of expression of the estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2). It is the most common subtype of breast cancer associated with BRCA1 mutations, and is associated with a poor prognosis. MEDGEN:770987 basal-like breast carcinoma EFO:0000281 UMLS:C3642347 basal-like subtype of breast carcinoma NCIT:C53558 MONDO:0004984 basal-like breast cancer triple-negative breast carcinoma obsolete_basal-like breast carcinoma