[Rare tumors of the cerebellopontine angle].
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.
Cosnard
G
G
Service de Radiologie, HIA du Val de Grâce, Paris.
Galidie
G
G
Cordoliani
Y S
YS
Le Gall
R
R
D002528:Cerebellar Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002530:Cerebellopontine Angle; D006801:Humans; D008279:Magnetic Resonance Imaging
Tumeurs rares dans l'angle ponto-cérébelleux.