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Gynecomastia is a common disorder of the endocrine system in which there is a non-cancerous increase in the size of breast tissue in males. Most adolescent boys, up to 70%, have some breast development during puberty. Newborn and adolescent males often experience temporary gynecomastia due to the influence of maternal hormones and hormonal changes during puberty, respectively. The development of gynecomastia is usually associated with benign pubertal changes; in adolescent boys, the condition is often a source of psychological distress. However, 75% of pubertal gynecomastia cases resolve within two years of onset without treatment. In rare cases, gynecomastia has been known to occur in association with certain disease states |
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