Bilateral Metastatic Gynecomastia from Small-Cell Lung Tumors in a Man: A Report of a Rare Case.

A case of a man with the recent onset of painful bilateral firm gynecomastia is reported. Mammography confirmed increased breast density. Biopsy characterized both masses as metastases of a small-cell lung tumor. This case highlights the atypical presentation and complements the literature regarding the rarity of breast metastases from small-cell lung cancer in men. Bilateral gynecomastia in a man with a long history of cigarette smoking should be considered with caution.