Hyperprolactinemia in women leads to amenorrhea, galactorrhea, and osteoporosis, while in men it may result in diminished sexual drive and impotence, or may be asymptomatic. The degree of hyperprolactinemia is directly related to the functionality of the prolactin-secreting tumor. Serum prolactin levels over 200 ng/mL correlate well with the presence of a prolactinoma. Normal prolactin levels are in the ranges of 1 -20ng/ mL in men, and 1-25 ng/mL in women.
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