Pheochromocytoma MRI

	Pheochromocytoma 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

Head, neck, chest, and abdominal MRI may be helpful in the diagnosis of pheochromocytoma.

T1 slightly hypointense to the remainder of the adrenal gland, if there is a necrosis and/or haemorrhage then the signal will be more heterogeneous
T2 markedly hyperintense (lightbulb sign, helpful in the diagnosis), areas of necrosis/haemorrhage/calcification will alter signal
T1 C+ (Gd) heterogenous enhancement is prolonged, persisting for as long as 50 minutes