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British Journal of Radiology (2006) 79, e148-e151
© 2006 British Institute of Radiology
doi: 10.1259/bjr/28725217
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Huge renal lipoma with prominent hypervascular non-adipose elements

I-C Chiang, MD 1,3 M-Y Jang, MD 4 K-B Tsai, MD 4 and T-J Hsieh, MD 1,3

Departments of 1Radiology 4Pathology, , Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, 3 Division of Medical Imaging, 4 Department of Urology, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan


Figure 1
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  		Figure 1. The CT demonstrated a huge mass with a prominent fat component. A small defect at the anterior portion of the middle pole of the right kidney was noted with fat density. The post-enhanced images showed some components with relatively intense enhancement.

 

Figure 2
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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.

 

Figure 3
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  		Figure 3. The angiogram demonstrated two feeding arteries supplying the huge mass at right retroperitoneum.(a) One of the feeding arteries came from one interlobar artery at the middle pole of right kidney and (b) another artery was from the right inferior artery that had a common trunk with right renal artery.

 




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