title: Acoustic schwannoma and petroclival meningioma occurring as collision tumours: a case report.
abstract: A case of a collision tumour comprising of an acoustic schwannoma and a petroclival meningioma in a 30-year old male patient is described. Both of these tumours were resected through a retrosigmoid route. The caudal portion of the mass was an acoustic schwannoma while the rostral portion was a distinct well-defined petroclival meningioma. The occurrence of an acoustic schwannoma and a petroclival meningioma in 'collision' has never been reported. The pathogenesis of such a rare entity is discussed and the relevant literature is briefly reviewed.
authors.affiliation: Department of Neurosurgery, Seth G.S. Medical College, Parel, Mumbai, India.
authors.forename: D P
authors.initials: DP
authors.lastname: Muzumdar
authors.forename: A
authors.initials: A
authors.lastname: Goel
mesh_terms: D000328:Adult; D002426:Cavernous Sinus / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008577:Meningeal Neoplasms / Q000150:complications* / Q000473:pathology; D008579:Meningioma / Q000150:complications* / Q000473:pathology; D009464:Neuroma, Acoustic / Q000150:complications* / Q000473:pathology