ERBB2 and breast cancer: These two studies had quite comparable distributions of BC subtypes (42 % and 56 % for LumA-like, 27 % and 22 % for LumB/HER2 neg.-like, 14 % and 7 % for LumB/HER2 pos.-like, 7 % and 4 % for HER2-type, and 11 % and 10 % for TN).