label: Luminal A Breast Carcinoma
label_lc: luminal a breast carcinoma
description: A biologic subset of breast carcinoma defined by high expression of genes characteristic of luminal epithelial cells, including estrogen receptor (ER), estrogen regulated protein LIV-1, and the transcription factors hepatocyte nuclear factor 3, HNF3A, XBP1, and GATA 3.  This subtype of breast cancer is associated with a good prognosis.