Objective To present two new cases of gynecomastia as the initial manifestation of
hyperthyroidism. Methods We describe detailed case reports of two men with breast
enlargement who were found to have hyperthyroidism, and we review the related literature.
Results Two men sought medical assistance because of unilateral tender gynecomastia. In
one of these patients, thyroid, gonadal, and prostate examinations showed normal findings
at the time of initial assessment, and symptoms of hyperthyroidism developed later. In our …