Primary breast mucormycosis: FNAC diagnosis of a rare entity.

Mucormycosis is the common name given to several different diseases caused by fungi in the order of mucorales. The clinical hallmark of these opportunistic pathogens in invasive mucormycosis is tissue necrosis resulting from angioinvasion and subsequent thrombosis. Rarely the disease may affect immunocompetent individuals. In addition, the breast involvement in this disease is very rare. Herein, we describe a case of primary breast mucormycosis diagnosed on fine needle aspiration cytology (FNAC), in an immunocompetent young female, which is extremely rare. Diagn. Cytopathol. 2016;44:761-763.