ERBB2 and breast cancer: Among the 96 breast cancer blocks selected in our study, the number of HER2 0, HER2 1+, HER2 2+ and HER2 3+ cases were 6(6/96, 6.3%), 69(69/96, 71.9%), 15(15/96,15.6%) and 6(6/96,6.3%), respectively.