Pituitary adenoma laboratory tests

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2]

Laboratory findings consistent with the diagnosis of pituitary adenoma include elevated serum prolactin level and elevated or decreased serum levels of other pituitary hormones.

• Laboratory findings consistent with the diagnosis of pituitary adenoma include:

• Elevated serum level of prolactin
• Elevated or decreased serum level of adrenocorticotropic hormone (ACTH)
• Elevated or decreased serum level of growth hormone (GH)
• Elevated or decreased serum level of thyroid-stimulating hormone (TSH)
• Elevated or decreased serum level of follicle-stimulating hormone (FSH)
• Elevated or decreased serum level of luteinizing hormone (LH)

• Some adenomas secrete more than one hormone, the most common combination being growth hormone and prolactin.