A prolactinoma is a benign tumor (adenoma) of the pituitary gland that produces a hormone called prolactin
. It is the most common type of pituitary tumor
and is seen more in women than in men. Symptoms of prolactinoma are too much prolactin in the blood (hyperprolactinemia
) or those caused by pressure
of the tumor on surrounding tissues. Prolactin suppresses gonadotropin-releasing hormone resulting in amenorrhea
, galactorrhea, loss of axillary and pubic hair, hypogonadism, gynecomastia, erectile dysfunction
in males, in amenorrhea, osteoporosis
, hypogonadism, and galactorrhea.