title: [Rare tumors of the cerebellopontine angle].
abstract: Tumours of the cerebellopontine angle are essentially benign in adults, are generally treated surgically and require a preoperative assessment as precise as possible. MRI simplifies the diagnostic assessment; it is indicated as the first-line investigation and is usually sufficient whenever a tumour of the posterior cranial fossa is suspected. Acoustic neuromas represent 75% of all tumours of the cerebellopontine angle. Other tumours are rare and essentially consist of meningioma, detected in 10 to 14% of cases and cholesteatoma in 1 to 5% of cases. Cholesteatoma, with a pathognomonic appearance, must be distinguished from arachnoid cyst. Other tumours are exceptional. The authors define the diagnostic criteria based on their experience and present a recent review of the literature.
authors.affiliation: Service de Radiologie, HIA du Val de Grâce, Paris.
authors.forename: G
authors.initials: G
authors.lastname: Cosnard
authors.forename: G
authors.initials: G
authors.lastname: Galidie
authors.forename: Y S
authors.initials: YS
authors.lastname: Cordoliani
authors.forename: R
authors.initials: R
authors.lastname: Le Gall
mesh_terms: D002528:Cerebellar Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002530:Cerebellopontine Angle; D006801:Humans; D008279:Magnetic Resonance Imaging
vernacular_title: Tumeurs rares dans l'angle ponto-cérébelleux.