metrizamide and Cholesteatoma

This report describes two cases of epidermoid tumor of the fourth ventricle diagnosed with metrizamide computed tomography. They both presented as a low-density lesion in the region of the fourth ventricle on computed tomography. They did not show any enhancement after intravenous injection of contrast medium and had no hydrocephalus. Metrizamide-enhanced computed tomography demonstrated the irregular fourth-ventricular filling defect characteristic of epidermoid tumors.

Topics: Adult; Brain Diseases; Cerebral Ventricles; Cerebral Ventriculography; Cholesteatoma; Humans; Injections, Spinal; Male; Metrizamide; Radiographic Image Enhancement; Tomography, X-Ray Computed

The technique and results of cerebello-pontine angle cisternography with metrizamide (Amipaque) in 34 patients are reported. Fourteen tumors were diagnosed. The internal auditory canal was normal in 19 patients, and in all of them the facial and statoacoustic nerves were visible. One examination was unsuccessful. No serious complications occurred. Headache was recorded in 76 per cent and transient EEG disturbance in 32 per cent of the patients.

Topics: Adult; Aged; Cerebellar Neoplasms; Cerebellopontine Angle; Cholesteatoma; Female; Humans; Male; Meningeal Neoplasms; Meningioma; Metrizamide; Middle Aged; Myelography; Neuroma, Acoustic