Abstract
For the diagnosis of cerebrospinal fluid leak, CT myelography (CTM) images of the epidural retention of contrast medium are accurate and useful, but it is impossible to identify the leak point. In this study, we performed CTM with dynamic myelography (DM) to detect the leak point. In four patients in whom cerebrospinal fluid leak was strongly suspected, CTM with DM was conducted five times. In three of five sessions of DM, the efflux of contrast medium from the subarachnoid cavity into the epidural space could be confirmed, suggesting the point of leak. In the other two sessions, it could not be confirmed, but it was possible to clarify the extent of the leak point based on the serial changes in contrast-enhanced epidural images. In conclusion, dynamic myelography may be useful for detecting the leak point of cerebrospinal fluid.
