がんの科学と治療

A Metaplastic Carcinoma of Ectopic Breast in Axilla Mimicking a Cutaneous Epidermoid Carcinoma: A Differential Diagnosis not to Disregard

Abstract

Berrada S, Elhamri L, Rais H, Quaboul M, Benchamkha Y and Khouchani M

Metaplastic carcinomas (MC) of the breast constitute a heterogeneous group of tumors, characterized by the presence of squamous or sarcomatoid differentiation. It is a rare type of malignant epithelial neoplasm that arises from the breast, and whose diagnosis is based on histology and immunochemistry. Location in ectopic breast tissue (EBT) in axilla is extremely rare, and when it ulcerates, it can mimic squamous cell carcinoma of skin. We report an unusual clinical case of a 61-year-old woman with metaplastic carcinoma in axillary ectopic breast, falsely diagnosed as a squamous cell carcinoma of skin.