Radiologic Evaluation of Small Renal Masses (I): Pretreatment Management
Figure 12
(a) Axial T1 in phase, (b) axial T1 out of phase, (c) axial haste T2 with fat saturation, and ((d–g) axial dynamic postcontrast T1 (d), arterial; (e), venous; (f), nephrographic, and (g), excretory phase): right yuxtahilar renal lesion seen as a T1 hyperintense mass that shows gross fat suppression on T2 revealing macroscopic fat and also probably small foci of peripheral fat as there is a small amount of signal loss on out of phase sequence. On dynamic postcontrast images the mass shows a transitional highly peripheral enhancement in the non-fat components with poor enhancement on the remaining postcontrast study. An angiomyolipoma was found at surgery.
