title: Hypoglossal neurinoma--two case reports.
abstract: Two patients presented with hypoglossal neurinoma extending both intra- and extracranially. A 63-year-old male presented with right trigeminal neuralgia and hypoglossal nerve paresis. The intracranial part of the tumor was removed totally via a suboccipital craniectomy. Over-coagulation of the venous collaterals, particularly the emissary veins, resulted in dural venous sinus thrombosis and cerebellar infarction. Unfortunately this patient died. A 48-year-old male presented with pareses of the VII, IX, X, XI, and XII cranial nerves and cerebellar sign. The tumor extended both extra- and intracranially, and was completely removed by opening the hypoglossal canal and the jugular foramen without over-coagulation of the venous collaterals. Preservation of the venous collaterals is very important for the prevention of postoperative venous complications.
authors.affiliation: Department of Neurosurgery, School of Medicine, Keio University, Tokyo.
authors.forename: M
authors.initials: M
authors.lastname: Hoshi
authors.forename: K
authors.initials: K
authors.lastname: Yoshida
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: T
authors.initials: T
authors.lastname: Kawase
mesh_terms: D002533:Cerebral Angiography; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D020437:Hypoglossal Nerve Diseases / Q000175:diagnosis* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed