Computer tomography of cerebellopontine angle lesions.
Computer tomography (CT) was used in 53 consecutive patients with a working diagnosis of cerebellopontine angle tumor. The CT was performed with the 160 X 160 matrix scanner, height of sections was 13 mm. Metrizoate sodium (1.5 ml/kg of body weight) was used for tumor enhancement. Seventeen CT scans revealed tumors; one patient proved at operation to be false-positive. Thirty-six CT scans revealed no tumors; two examinations may prove to be false-negative, but surgical verification has so far not been obtained. The smallest tumor demonstrated by CT extended 7 mm into the angle, while one of the possible false-negative CT scans after iophendylate injection cisternography showed a tumor extending 5 mm into the angle. It is concluded that CT is a harmless, noninvasive neuroradiological procedure, and should precede invasive procedures. It can be used safely in patients with increased intracranial pressure.
D000328:Adult; D000368:Aged; D002528:Cerebellar Neoplasms / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002530:Cerebellopontine Angle / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008579:Meningioma / Q000000981:diagnostic imaging; D008875:Middle Aged; D009463:Neuroma / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed