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:

• Prolactin: 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.

References

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