Gynecomastia - Correction of Enlarged Male Breasts A word about breast reduction in men... Gynecomastia is a medical term that comes from the Greek words for "women-like breasts." Though this oddly named condition is rarely talked about, it's actually quite common. Gynecomastia affects an estimated 40 to 60 percent of men. It may affect only one breast or both. Though certain drugs and medical ...