title: The first case of renal lipoma in a child.
abstract: Lipoma of the kidney is a rare benign renal tumor that previously had been reported only in adults. We present a case of this tumor in a 2-year-old boy. Serial imaging studies revealed a tumor with high fat content arising from the right kidney. Radical nephrectomy was performed for tumor excision. Macroscopically, the tumor consisted of a yellow fatty mass, which was surrounded by a thin fibrous capsule. The tumor was about 600 g, and the kidney was compressed laterally by the tumor. Microscopically, the tumor consisted of large fat cells that did not express human melanoma black-45 (HMB-45). It was diagnosed as a renal lipoma. Postoperatively, there has been no recurrence of tumor in the 10 months since the surgical excision.
authors.affiliation: Department of Urology, Chongqing Children's Hospital, Chongqing Medical University, Chongqing, 400014 China.
authors.forename: Xing
authors.initials: X
authors.lastname: Liu
authors.forename: Xiangmei
authors.initials: X
authors.lastname: Wu
authors.forename: Dawei
authors.initials: D
authors.lastname: He
authors.forename: Guanghui
authors.initials: G
authors.lastname: Wei
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Lin
authors.forename: Xuliang
authors.initials: X
authors.lastname: Li
mesh_terms: D001707:Biopsy, Needle; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D008067:Lipoma / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D008297:Male; D009367:Neoplasm Staging; D009392:Nephrectomy / Q000379:methods*; D035583:Rare Diseases; D018570:Risk Assessment; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler