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Causes of Gynecomastia
What Causes Gynecomastia?
Gynecomastia is usually a benign (non-cancerous) condition that may be caused by many different hormonal changes, or the cause may be unknown. The changes in hormones usually include an increase in estrogens or a decrease in androgens (testosterone). Sometimes, this condition may be associated with other diseases that must be ruled out in order to make a diagnosis. In some conditions, including breast cancer, liver diseases, lung cancer, testicular cancer, tumors of the adrenal glands or pituitary gland, drug use, certain congenital (present at birth) syndromes, or thyroid disorders or trauma, gynecomastia may present itself as a symptom.