title: [A case of accessory nerve neurinoma presenting an intracisternal tumor].
abstract: A case of neurinoma from the spinal accessory nerve which is located in the cisterna magna is reported. A 54-year-old woman was admitted to the institute in 1990 with complaints of headache, nausea and ataxic gait for several months. Plain CT showed dilation of the lateral ventricles and a mass of lower density in the cisterna magna. The capsule and septa of the mass were enhanced with contrast medium. MRI showed the mass was low intense on T1-weighted images and high intense on T2-weighted images. Gadolinium visualized the mass multicystic. V-P shunt was performed before tumor resection. Through suboccipital craniectomy and C1 laminectomy the tumor was removed. The tumor had a long neck attached to the right spinal accessory nerve and extended to the cisterna magna.
authors.affiliation: Department of Neurosurgery, Kagawa Medical School.
authors.forename: S J
authors.initials: SJ
authors.lastname: Soo
authors.forename: K
authors.initials: K
authors.lastname: Irie
authors.forename: T
authors.initials: T
authors.lastname: Fujiwara
authors.forename: H
authors.initials: H
authors.lastname: Kuyama
authors.forename: S
authors.initials: S
authors.lastname: Nagao
mesh_terms: D000055:Accessory Nerve; D002946:Cisterna Magna; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008577:Meningeal Neoplasms / Q000175:diagnosis; D009442:Neurilemmoma / Q000175:diagnosis* / Q000601:surgery