Metaplastic Sarcomatoid Carcinoma of the Breast. Case Report

Metaplastic Tumors of the mammary gland are infrequent. The diagnosis should be based on studies of hematoxylin and eosin, confirmed by inmunohistochemical markers. It is a type of malignant neoplasm which includes a group of uncommon heterogeneous entities characterized by mixing a high grade invasive ductal epithelial component with a squamous or sarcomatoid component which adopts a variable phenotype. Its prognosis is worse than conventional carcinomas and is related to the tumor size, histological type, and grade of mesenquimatic component. For these reasons a case of a 63 year old patient who was diagnosed with this infrequent breast tumor that was diagnosed by inmunohistochemical techniques.