ERBB2 and breast cancer: Other recurrent nonsilent mutations (≥ 3 cases) were found in 24 breast cancer- or cancer-related genes including TP53 (13 cases), ATM (7 cases), CDH1 (7 cases), APC (6 cases), ERBB2 (5 cases), FGFR1 (5 cases), and MET (5 cases).