Gynecomastia

Gynecomastia, a benign enlargement of the male breast due to proliferation of the glandular component, is a common clinical condition. It may be an incidental finding on routine examination or may present as an acute unilateral or bilateral painful tender mass beneath the areolar region or as a progressive painless enlargement of the breast. This topic was last reviewed in the Journal in 1980,1 and much of the recent literature has focused on the prevalence, pathogenesis, and treatment of the condition.PrevalencePalpable breast glandular tissue is so prevalent in population studies of men and boys115 (Table 1) that . . .