title: Dumbbell-shaped trigeminal neurinoma in a child.
abstract: We experienced a case of solitary trigeminal neurinoma in a 10-year-old boy without stigmata of neurofibromatosis. This boy presented with progressive cerebellar ataxia, right abducens palsy and right hemiparesis. Magnetic resonance images (MRI) demonstrated a tumour extending into both the middle and posterior fossas forming a dumbbell-shaped mass lesion with a size of 35 x 30 x 45 mm. The tumour was successfully removed free of complications by a two-stage operation composed of right subtemporal and suboccipital retromastoid approaches. It is extremely rare for a solitary neurinoma to occur at this site in a child without neurofibromatosis. Surgical approaches in this type of tumour are discussed with a review of the literature.
authors.affiliation: Department of Neurological Surgery, University of Tsukuba, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tsuboi
authors.forename: H
authors.initials: H
authors.lastname: Fujimori
authors.forename: Y
authors.initials: Y
authors.lastname: Tomono
authors.forename: K
authors.initials: K
authors.lastname: Hamano
authors.forename: T
authors.initials: T
authors.lastname: Nose
mesh_terms: D002648:Child; D003390:Cranial Nerve Neoplasms / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009442:Neurilemmoma / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome; D014276:Trigeminal Nerve / Q000601:surgery*