MRI of the lumbo-sacral spine demonstrated an enlargement of the conus medullaris with high T2 signal intramedullary lesion. It showed also large intradural serpentine vessels. A left iliac ...

The term ventriculus terminalis or fifth ventricle is used to describe a cavity containing cerebrospinal fluid (CSF) localized inside the conus medullaris, delimited by normal ependymal tissue.