Metrizamide CT cisternography in the diagnosis and localization of cerebrospinal fluid rhinorrhea.

Metrizamide computed tomography cisternography was performed for the diagnosis and accurate localization of cerebrospinal fluid (CSF) rhinorrhea in six patients (five posttraumatic and one spontaneous). The examination not only delineated the fracture or bony defect through the base of the skull, but it also demonstrated the leakage of CSF mixed with metrizamide.