ERBB2 and cancer: Because of the lack of immunohistochemistry results for one case of a phyllodes tumor, a total of 120 lesions of cancer were finally selected, including 33 cases of Luminal A, 56 cases of Luminal B (16 cases of HER2-positivity and 40 cases of HER2-negativity), 15 cases of HER2 overexpression, and 16 cases of TNBC.