title: Huge renal lipoma with prominent hypervascular non-adipose elements.
abstract: 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.
authors.affiliation: Department of Radiology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
authors.forename: I-C
authors.initials: IC
authors.lastname: Chiang
authors.forename: M-Y
authors.initials: MY
authors.lastname: Jang
authors.forename: K-B
authors.initials: KB
authors.lastname: Tsai
authors.forename: T-J
authors.initials: TJ
authors.lastname: Hsieh
mesh_terms: D000328:Adult; D018207:Angiomyolipoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis*; D008080:Liposarcoma / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed