title: Ureteropelvic junction obstruction due to inflammatory pseudotumor masquerading as hydronephrosis because of a neuropathic bladder in a child with myelomeningocele.
abstract: Inflammatory pseudotumors (IPTs), also known as inflammatory myofibroblastic tumors, are rare solid lesions, generally thought to be benign, which have been described in a variety of locations. We report a case of a child with a neuropathic bladder who developed a pseudotumor of the retroperitoneum that caused progressive ureteral obstruction distal to the ureteropelvic junction. Hydronephrosis as a complication of IPTs has been described with bladder and uterine IPTs; however, in our review of published reports, we found no reported cases of a retroperitoneal IPT causing proximal ureteral obstruction in a pediatric patient.
authors.affiliation: Department of Urology, James Whitcomb Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana, USA.
authors.forename: T E
authors.initials: TE
authors.lastname: Emley
authors.forename: M P
authors.initials: MP
authors.lastname: Cain
authors.forename: P R
authors.initials: PR
authors.lastname: Faught
authors.forename: M M
authors.initials: MM
authors.lastname: Davis
mesh_terms: D002675:Child, Preschool; D003937:Diagnosis, Differential; D006104:Granuloma, Plasma Cell / Q000150:complications* / Q000175:diagnosis*; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis; D007682:Kidney Pelvis / Q000000981:diagnostic imaging; D008297:Male; D008591:Meningomyelocele / Q000150:complications*; D014463:Ultrasonography; D014517:Ureteral Obstruction / Q000175:diagnosis* / Q000209:etiology*; D001750:Urinary Bladder, Neurogenic / Q000150:complications*; D014567:Urography