Gynecomastia, a condition of over-developed or enlarged breasts in men, is common in men of any age. It can be the result of hormonal changes, heredity conditions, disease or the use of certain drugs. Gynecomastia surgery can improve the appearance of the chest in cases where diet and exercise have failed. The results of the procedure are significant and permanent. Most men who have had surgery for gynecomastia have been very satisfied with the results.