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Department of Pathology and Laboratory Medicine, Danbury Hospital, Connecticut, USA.
We report a case of mammary duct carcinoma with a prominent lipid-rich, sebaceous-like component, occurring in a 55 yr old white male. The patient presented with a painless, subareolar left breast mass and the diagnosis of malignancy was made by fine needle aspiration. Subsequent modified radical mastectomy revealed an infiltrating and in situ ductal carcinoma with dermal invasion and numerous vacuolated sebaceous-like tumor cells, positive for neutral lipid by Oil Red O stain. We propose that this case represents an unusual variant of lipid-secreting breast carcinoma. To the best of our knowledge, this subtype of mammary carcinoma is unprecedented in male breast.
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