title: Schwannoma of the oculomotor nerve: a case report with consideration of the surgical treatment.
abstract: OBJECTIVE
  Oculomotor schwannoma is extremely rare. We report a case of oculomotor schwannoma with consideration of its surgical management.
  
  
  METHODS
  A 64-year-old woman with a history of chronic headache underwent a computed tomographic scan, which revealed a mass lesion in the right prepontine cistern. She had no neurological deficits at admission.
  
  
  METHODS
  The tumor originated from the right oculomotor nerve. It was subtotally removed, leaving a tiny part attached to the nerve. The nerve trunk was preserved. A pathological examination revealed a schwannoma. Transient right oculomotor nerve palsy occurred postoperatively, but it improved almost completely.
  
  
  CONCLUSIONS
  The tumor in the present case was resected, preserving serviceable oculomotor function. However, among 16 patients reported in the literature, all but one developed or maintained severe postsurgical oculomotor nerve palsy. We conclude that surgical resection generally is not indicated for oculomotor schwannomas, excluding large tumors that cause intractable symptoms.
authors.affiliation: Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Asaoka
authors.forename: Y
authors.initials: Y
authors.lastname: Sawamura
authors.forename: H
authors.initials: H
authors.lastname: Murai
authors.forename: M
authors.initials: M
authors.lastname: Satoh
mesh_terms: D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D003399:Craniotomy; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D009802:Oculomotor Nerve / Q000000981:diagnostic imaging / Q000473:pathology; D015840:Oculomotor Nerve Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed