title: Retroperitoneal neurogenous choristoma.
abstract: A 6-year-old girl with urinary complaints underwent ultrasonography, which revealed a retroperitoneal cystic mass adjacent to the left kidney. Computerized tomography did not demonstrate whether the mass was an adrenal cyst or a duplicated upper pole segment. Exploration revealed a neurogenous choristoma, which is a collection of histologically normal tissue that is ectopically situated. We believe that this is the first report of this rare entity occurring in the retroperitoneum.
authors.affiliation: Section of Urology, University of Michigan, Ann Arbor.
authors.forename: J
authors.initials: J
authors.lastname: Wan
authors.forename: M L
authors.initials: ML
authors.lastname: Ritchey
authors.forename: K
authors.initials: K
authors.lastname: Muraszko
authors.forename: D A
authors.initials: DA
authors.lastname: Bloom
mesh_terms: D002648:Child; D002828:Choristoma / Q000175:diagnosis*; D005260:Female; D006801:Humans; D009420:Nervous System; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*