| http://www.w3.org/ns/prov#value | - Gynecomastia is a benign enlargement of the male breast resulting from a proliferation of the glandular component of the breast.When gynecomastia occurs in adult males, it is usually caused by another condition, such as liver or lung cancer, cirrhosis of the liver, overactive thyroid, or by hormone problems, such as cancer of the pituitary gland , adrenal glands , or testicles.
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