Learn how an imbalance of the hormones estrogen and testosterone can cause swelling of the breast tissue in boys or men.
Male breast cancer is difficult to study because of its relative rarity compared with breast cancer in women; it is 100-fold more frequent in.
Gynecomastia is an enlargement or swelling of breast tissue in males. It is most commonly caused by male estrogen levels that are too high or are out of balance .
Gynecomastia is the benign enlargement of male breast glandular tissue and is the  The higher estrogen production rates in older males are related to an.
Sometimes when that happens, a higher percentage of estrogen causes male breast tissue to swell. About half of adolescent boys and as many.