Metrizamide cisternography of the cerebello-pontine angle by lateral C1-C2 puncture.

Cisternography of the cerebello-pontine angle was performed with metrizamide using pluridirectional motion tomography on the Polytome. Lateral puncture between C1-C2 with a low pressure technique was used with the patient in lateral decubitus position. In a series of 20 patients all examinations were conclusive and small acoustic neuromas were seen in three patients. The investigation is easy to perform and sufficient contrast-medium-filling of the cerebello-pontine cistern and the internal auditory canal was obtained with 2 ml metrizamide (300 mg I/ml).