Figure 4.

A 70-year-old man with uncontrolled hypertension despite medical therapy with left adrenal gland pheochromocytoma confirmed by circulating catecholamines dosage. The lesion (arrows) presents moderate signal intensity on axial TSE T2-w images (A) and hypointense on in-phase T1 sequence (B) without significant loss of signal in out-of-phase sequence (C) since pheochromocytoma does not contain significant amount of intracellular lipid. The DWI sequences (D,E) in b=1,000 images and the ADC map (F) show significant restricted diffusion. Arterial (G) and venous phase (H) demonstrate inhomogeneous enhancement of the lesion with central area of necrosis after Gadolinium administration. DWI, diffusion weighted imaging.