Common and Rare Causes of Gynecomastia

Physiologic Gynecomastia Gynecomastia is the proliferation of benign glandular breast tissue in men. Gynecomastia can be physiologic (normal body function), such as in newborns, adolescent young men and older men after the age 50. Gynecomastia can also be non-physiologic occurring at any age. For physiologic gynecomastia, newborn babies may show…