Twelve cases of metaplastic carcinoma of the breast: experience of the university hospital of Fez Morocco.

Introduction: Metaplastic breast carcinoma (MBC) is a distinct invasive breast carcinoma. It is a rare and heterogeneous group of malignancies, generally characterized by hormone receptor and human epidermal growth factor receptor 2 (HER2) negativity. The aim of the study is to evaluate epidemiological aspects, clinical characteristics, pathological features and biological profile of MBC cases diagnosed in our institution.