Triple-Negative Phenotype of Poorly-differentiated Metaplastic Breast Carcinoma in a Male: An Oncological Rarity

Metaplastic breast carcinoma (MBC) is an extremely rare breast malignancy having highly aggressive clinicopathological behaviour and dismal prognosis. A 75 years old man presented with a painless lump on right side of his chest along with two additional lumps in the ipsilateral axillary and inguinal areas. Microscopic evaluation and immunohistochemistry of tru-cut tissue biopsies of the lumps and that of. mastectomy specimen revealed a triple-negative phenotype of poorly-differentiated metaplastic breast carcinoma with metastatic deposits to the axillary and inguinal lymph nodes. Exhaustive internet research has revealed only a few case reports of MBC in the men; thus highlighting its absolute oncological rarity.