title: Cerebellopontine angle arachnoid cyst harbouring ectopic neuroglia.
abstract: Arachnoid cysts are collections of cerebrospinal fluid covered by arachnoidal cells and collagen. They may have a congenital or acquired origin. We present the case of a 7-year-old boy with a cerebellopontine angle arachnoid cyst harbouring a portion of neuroglia. Microscopically, the cyst wall consisted of a delicate fibrovascular membrane lined by a layer of arachnoidal cells. A thin layer of glial tissue ran the whole length of the cyst wall. This finding supports a congenital origin for this case. Cerebellopontine angle arachnoid cysts harbouring neuroglia without ependymal elements are very rare lesions and may be successfully treated by surgical resection.
authors.affiliation: Department of Neurosurgery, University Hospital of Tubingen, Tubingen, Germany.
authors.forename: Shafie
authors.initials: S
authors.lastname: Ariai
authors.forename: Andrei
authors.initials: A
authors.lastname: Koerbel
authors.forename: Antje
authors.initials: A
authors.lastname: Bornemann
authors.forename: Matthias
authors.initials: M
authors.lastname: Morgala
authors.forename: Marcos
authors.initials: M
authors.lastname: Tatagiba
mesh_terms: D016080:Arachnoid Cysts / Q000473:pathology* / Q000601:surgery; D002530:Cerebellopontine Angle; D002648:Child; D002828:Choristoma / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D009457:Neuroglia