[Gynecomastia. Radiological and pharmacological aspects].

Though frequently unilateral on clinical examination, mammography often reveals the presence of a small impalpable gynecomastia in the contralateral breast. The left breast appears to be the one usually involved, both clinically and radiologically. Gynecomastia is usually iatrogenic in nature, mainly as a result of cardiac stimulants or diuretics, but on rare occasions arises from severe unsuspected organic lesions in the testes, liver, or adrenals, or from endocrine disequilibrium.