Idiopathic gynecomastia

Gynecomastia (also spelled Gynaecomastia), is the abnormal non-cancerous enlargement of one or both breasts in men due to the growth of breast tissue as a result of a hormone imbalance between estrogen and androgen. Gynecomastia can cause significant psychological distress or unease.Gynecomastia can be normal in newborn babies due to exposure to estrogen from the mother, in adolescents going through puberty, and in obesity and older men. [Source: Wikipedia ]