Histo-clinical characteristics of the 1,387 breast cancer patients.

N, number of cases available; DUC, ductal carcinoma, LOB, lobular carcinoma, MIX, mixed; MED, medullary carcinoma; pN, pathological lymph node involvement; pT, pathological tumor size; IHC, immunohistochemistry; ER, estrogen receptor; PR, progesterone receptor; DFS, disease-free survival; OS, overall survival;*, non-stage IV patients; pCR, pathological complete response to primary chemotherapy defined as disappearance of the invasive component of the primary tumor after treatment.