title: Perinephric angiomyolipoma: a unique development pattern surrounding the kidney.
abstract: We report a case of a 31-year-old man with extrarenal angiomyolipoma of the perinephric space. He presented with asymptomatic macrohematuria. Computed tomography of the abdomen revealed a large perinephric mass which was separated from the right kidney and its unique growth appeared to have surrounded the kidney. Extrarenal angiomyolipomas of the perinephric fat are rare and they should be considered in the differential diagnosis of a retroperitoneal mass where asymptomatic macrohematuria was presented at the onset.
authors.affiliation: Department of Urology, Iwate Medical University School of Medicine, Morioka, Japan. watao@iwate-med.ac.jp
authors.forename: Wataru
authors.initials: W
authors.lastname: Obara
authors.forename: Kazunori
authors.initials: K
authors.lastname: Sato
authors.forename: Yukihisa
authors.initials: Y
authors.lastname: Owari
authors.forename: Tatsuru
authors.initials: T
authors.lastname: Nozawa
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Isurugi
authors.forename: Sou
authors.initials: S
authors.lastname: Ohmori
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Matsushita
authors.forename: Susumu
authors.initials: S
authors.lastname: Tanji
authors.forename: Ryuichiro
authors.initials: R
authors.lastname: Konda
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Fujioka
mesh_terms: D000328:Adult; D018207:Angiomyolipoma / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D009392:Nephrectomy; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D014057:Tomography, X-Ray Computed