Unilateral gynaecomastia--an unusual presentation of thyrotoxicosis.

Thyrotoxicosis along with its usual signs and symptoms like palpitation, weight loss, tremors, sweating, heat intolerance, diarrhea, exophthalmos, tachycardia, and warm extremities, can also present with gynaecomastia and as many as 80% of the patients may have histological evidence of gynaecomastia 1-4 . Although association of thyrotoxicosis with gynaecomastia is well documented, its presentation as the initial or the predominant compliant in a subject with undiagnosed hyperthyroidism is extremely rare 5 . Gynaecomastia in thyrotoxicosis may predominate over other commonly recongnized symptoms. A patient who presented with tender unilateral gynaecomastia secondary to thyrotoxicosis is described.