title: Xanthogranulomatous pyelonephritis with a renocolic fistula caused by a parapelvic cyst.
abstract: Fistula formation between the upper urinary tract and bowel is an uncommon complication in urogenital diseases. We present a rare case of focal xanthogranulomatous pyelonephritis with a renocolic fistula. This is the first case where a parapelvic cyst obstructs the caliceal outflow and leads to the formation of a renocolic fistula in renal inflammatory disease. It is difficult to make a preoperative diagnosis of focal xanthogranulomatous pyelonephritis with widespread involvement that is caused by non-calculous urinary tract obstruction.
authors.affiliation: Department of Urology, Tokyo Metropolitan Tama Geriatric Hospital, Tokyo, Japan. yoh-m.uro@tmd.ac.jp
authors.forename: Yoh
authors.initials: Y
authors.lastname: Matsuoka
authors.forename: Gaku
authors.initials: G
authors.lastname: Arai
authors.forename: Hisashi
authors.initials: H
authors.lastname: Ishimaru
authors.forename: Kentaro
authors.initials: K
authors.lastname: Takagi
authors.forename: Junko
authors.initials: J
authors.lastname: Aida
authors.forename: Yume
authors.initials: Y
authors.lastname: Okada
mesh_terms: D003108:Colonic Diseases / Q000175:diagnosis / Q000209:etiology*; D003560:Cysts / Q000150:complications* / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007412:Intestinal Fistula / Q000175:diagnosis / Q000209:etiology*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010388:Pelvis; D011705:Pyelonephritis, Xanthogranulomatous / Q000175:diagnosis / Q000209:etiology*; D014057:Tomography, X-Ray Computed; D014548:Urinary Fistula / Q000175:diagnosis / Q000209:etiology*; D014567:Urography