ERBB2 and breast cancer: (53) conducted a study to evaluate molecular differences between an Asian cohort of women from Korea (n=187) with breast cancer, and a group of Caucasians (n=745) and AAs (n=158) from The Cancer Genome Atlas (TCGA) database, and showed a higher frequency of somatic alterations (mutations and copy number variations (CNVs)) in ERBB2 in the Asian cohort (20% vs. 9.1%, respectively), along with a higher proportion of HER2-enriched (8% vs 2.9%, respectively) and luminal/HER2 subtypes (14.4% vs. 10.4%, respectively) in Asian women, compared to the TCGA group (Caucasians + AAs).