Primary squamous cell carcinoma of the breast is rare. We report a case of primary squamous cell carcinoma of the breast. It is a 47-year-old woman. She has an ulcerated, budding mass measuring 11 cm in diameter in the right breast. She underwent a right mastectomy. The diagnosis was non-keratinizing, moderately differentiated squamous cell carcinoma of the breast, stage IIIB invasive. Immunohistochemical testing was negative for estrogen and progesterone receptors but positive for cytokeratin CK 5/6. Diagnosis is histological and it is important to differentiate its primary breast origin from skin tumors or metastases from other organs.
Loading....