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Figure 2. The huge mass lesion in the anterior aspect of the right retroperitoneum showed heterogeneous hyperintensity on(a) in-phase T1 weighted images and heterogeneous hypointensity on (b) out-of-phase T1 weighted images. This supported the diagnosis that the mass had prominent fat component. (c) The T2 weighted images with fat suppression revealed heterogeneously hyperintense components that had significant enhancement in (d) axial and (e) coronal T1 weighted images after intravenous gadolinium administration. It suggested that the mass had some hypervascular components. There were some tubular enhancements in the mass and vessels were suspected. The renal defect was still noted in MRI and was connected with the huge retroperitoneal mass. It suggested that the mass originated from the right kidney and grew as a peduncular tumour.
