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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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Case report

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

Correspondence: Tsyh-Jyi Hsieh, 13Fl, No. 392, Nan-Ping Road, Kaohsiung, Taiwan. E-mail: hh2001{at}ms69.hinet.net.

A primary renal lipoma is a very rare neoplasm of the kidney and only 20 cases have been reported in the literature. We report a case of a huge retroperitoneal mass that presented as a hypervascular tumour with a prominent fat component, mimicking an angiomyolipoma or a liposarcoma in imaging studies. This finding presented a diagnostic challenge in terms of selecting medical versus surgical intervention. Surgical excision of the lesions was performed and the pathological evaluation revealed a renal lipoma with extrarenal growth.






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