NCIt synonyms : Luminal B Subtype of Breast Carcinoma; Luminal B Estrogen Receptor Positive Subtype of Breast Carcinoma; Luminal B Estrogen Receptor Positive Subtype of Invasive Breast Carcinoma; Luminal B; Luminal B Breast Cancer;
NCIt definition : A biologic subset of breast carcinoma defined by low to moderate expression of genes
characteristic of luminal epithelial cells including estrogen receptor (ER), and high
expression of GGH, LAPTM4B, and CCNE1. This subtype of breast cancer is associated
with a good prognosis, although not as favorable as the luminal A subtype.;