title: Fat-containing variant of solitary fibrous tumor (lipomatous hemangiopericytoma) arising on surface of kidney.
abstract: Fat-containing variant of a solitary fibrous tumor is a recently recognized benign soft-tissue tumor that usually affects the thigh and retroperitoneum. We report a 51-year-old woman with a fat-containing variant of a solitary fibrous tumor that is the first reported case involving a visceral organ. The tumor was well delineated and seemed to arise from the renal capsule, radiographically and macroscopically. The tumor microscopically mimicked a solitary fibrous tumor but exhibited focal aggregates of fat cells. A fat-containing variant of a solitary fibrous tumor involving the kidney should be distinguished from spindle cell carcinoma, angiomyolipoma, gastrointestinal stromal tumor, and cellular schwannoma.
authors.affiliation: Department of Pathology, Koshigaya Hospital, Dokkyo University School of Medicine, Koshigaya, Saitama, Japan. takehiko@dokkyomed.ac.jp
authors.forename: Takehiko
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Toshiro
authors.initials: T
authors.lastname: Takimoto
authors.forename: Takahisa
authors.initials: T
authors.lastname: Yamashita
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kitahara
authors.forename: Minoru
authors.initials: M
authors.lastname: Omura
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Ueda
mesh_terms: D000273:Adipose Tissue / Q000473:pathology*; D014408:Biomarkers, Tumor / Q000032:analysis; D002292:Carcinoma, Renal Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006393:Hemangiopericytoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D009392:Nephrectomy; D014057:Tomography, X-Ray Computed
chemical_list: D014408:Biomarkers, Tumor