Primary aspergillosis of the breast. Report of a case with fine needle aspiration cytology diagnosis.

We report an unusual case of primary Aspergillus flavus fungal colonization in a subareolar breast mass in a middle-aged woman. The patient was clinically normal, with no evidence of immunosuppression. Fine needle aspiration cytology was carried out as a routine procedure to rule out malignancy, and Aspergillus infection was diagnosed on cytology. Cultures from fine needle aspiration cytology and the surgical biopsy material yielded a heavy growth of A flavus. The etiology and pathology of this fungal lesion presenting as a breast mass are discussed.