ERBB2 and triple-negative breast carcinoma: In the present analysis, intrinsic subtypes were categorized into the three subgroups according to the different combinations of HER2 and HR status as follows: HER2-positive (regardless of HR status; abbreviated to HER2+), HR-positive and HER2-negative (HR+/HER2-), and triple negative breast cancer (HR-/HER2-; abbreviated to TNBC).