title: Intradural extra-arachnoid schwannoma of the upper cervical spine.
abstract: A very rare case of intradural extra-arachnoid schwannoma involving the upper cervical spine is described. The tumour most likely originated from the extra-subarachnoid angle region, with its unusual pattern of expansion within the spinal canal resulting from such characteristics of the upper cervical region as a relatively wide spinal canal, an extensive ventral subarachnoid space, and membranous ventromedian and lateral anchoring structures which influenced the direction of tumour enlargement.
authors.affiliation: Department of Orthopedic Surgery, Tokai University, School of Medicine, Bohseidai, Isehara, Kanagawa, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: J
authors.initials: J
authors.lastname: Mochida
authors.forename: K
authors.initials: K
authors.lastname: Nishimura
authors.forename: T
authors.initials: T
authors.lastname: Nomura
authors.forename: S
authors.initials: S
authors.lastname: Miyazaki
mesh_terms: D002574:Cervical Vertebrae; D004388:Dura Mater; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000473:pathology*; D008875:Middle Aged; D009442:Neurilemmoma / Q000473:pathology*; D013115:Spinal Canal