Sometimes, there may be no noticeable signs or symptoms from prolactinoma. When signs and symptoms are present, they may be caused by excessive prolactin in your blood (hyperprolactinemia) or, if the tumor is large, from the pressure of the tumor on surrounding tissues. Because elevated levels of the hormone prolactin cause disruption of the reproductive system (hypogonadism), some of the signs and symptoms of prolactinoma are specific to females or males.

Nov. 30, 2012