Pituitary adenoma MRI

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

Overview

MRI Findings in Pituitary Adenoma

Macroadenoma

T1

typically isointense to grey matter

larger lesions are often heterogeneous and vary in signal due to areas of cystic change/necrosis/haemorrhage

T1 C+ (Gd)

A solid components demonstrates moderate to bright enhancement

T2

typically isointense to grey matter

larger lesions are often heterogeneous and vary in signal due to areas of cystic change / necrosis / haemorrhage

T2 gradient echo

most sensitive for detecting any haemorrhagic components, which appear as areas of signal loss calcification is rare, but should be excluded by reviewing CT scans

Patient #1: Pituitary marcoadenoma