Gynecomastia or Gynaecomastia, /ˌɡaɪnɨkɵˈmæstiə/, is the abnormal development of large mammary glands in males resulting in breast enlargement. The term comes from the Greek γυνή gyné (stem gynaik-) meaning "woman" and μαστός mastós meaning "breast." The condition can occur physiologically in neonates (due to female hormones from the mother), in adolescence, and in the elderly (Both in adolescence and elderly it is an abnormal condition associat...
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Gynecomastia or Gynaecomastia, /ˌɡaɪnɨkɵˈmæstiə/, is the abnormal development of large mammary glands in males resulting in breast enlargement. The term comes from the Greek γυνή gyné (stem gynaik-) meaning "woman" and μαστός mastós meaning "breast." The condition can occur physiologically in neonates (due to female hormones from the mother), in adolescence, and in the elderly (Both in adolescence and elderly it is an abnormal condition associated with disease or metabolic disorders). In adolescent boys the condition is often a source of distress, but for the large majority of boys whose pubescent gynecomastia is not due to obesity, the breast development shrinks or disappears within a couple of years.
The causes of common gynecomastia remain uncertain, although it has generally been attributed to high levels of sex hormone-binding globulin (SHBG) resulting in low levels of free testosterone or the tissue responsiveness to them; a root cause is rarely determined for individual cases....
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