Prolactinoma MRI

	Prolactinoma Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Anmol Pitliya, M.B.B.S. M.D.[2], Faizan Sheraz, M.D. [3]

Overview

MRI may be diagnostic of prolactinoma. Magnetic resonance imaging (MRI) is the most sensitive test for detecting pituitary tumors and determining their size.

Key MRI finding in prolactinoma

MRI may be diagnostic of prolactinoma. Magnetic resonance imaging (MRI) is the most sensitive test for detecting pituitary tumors and determining their size. Contrast enhanced MRIs have a sensitivity of 90%. Findings on MRI scan suggestive of prolactinoma include:^[1]


MRI Component	Features

T1	usually isointense to normal pituitary
T1 C+ (Gd)	dynamic sequences demonstrate a rounded region of delayed enhancement compared to the rest of the gland delayed images are variable, ranging from hypo-enhancement (most common) to isointense to the rest of the gland, to hyperintense (retained contrast)
T2	variable, but often a little hyperintense