Prolactinoma laboratory tests
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Faizan Sheraz, M.D. [2]
Overview
Laboratory findings consistent with the diagnosis of prolactinoma include elevated prolactin levels and reduced thyroid hormone levels.
Laboratory Findings
Laboratory findings consistent with the diagnosis of prolactinoma include elevated prolactin levels and reduced thyroid hormone levels. Prolactin blood levels are tested in women with unexplained milk secretion (galactorrhea) or irregular menses or infertility, and in men with impaired sexual function and, in rare cases, milk secretion.
- Prolactin levels in blood: The blood level of prolactin in patients with prolactinoma may be higher than normal >250 ng/ml.
- Testosterone levels in men: Blood levels of testosterone in men with prolactinoma may decrease.
- Thyroid function tests are done(hypothyroidism) if prolactin is elevated.