CARCINOMA SARCOMATOIDE MONOFáSICO DE MAMA: CASO CLíNICO

sarcomatoid carcinoma of the breast is a histological variant of metaplastic carcinoma, composed predominantly of spindle cells. we report a case of a tumor in a woman of 54 years old, which suggested a clinical and radiological malignant tumor. finally the histology and immunohistochemistry confirmed the diagnostic of monophasic sarcomatoid carcinoma. in this variant of sarcomatoid carcinoma, is not possible to identify a clear epithelial component, creating problems of differential diagnosis between sarcomas and other mesenchymal damages. the immunohistochemical demonstration of epithelial nature of the spindle cells was essential for the diagnosis.