A conventional (non-dynamic) CT myelogram of the lumbar, thoracic and cervical spine was performed.
The cerebellar tonsils extend 1cm beyond the foramen magnum.
There is pooling of contrast within the epidural space of the entire spine from lumbar to base of skull. In the cervical region, contrast is seen extending beyond the epidural space at multiple levels: bilaterally surrounding around the lower three cervical nerve roots (C6-8) and posteriorly at the C1/2 level. In the setting of abundant epidural fluid, these do not necessarily indicate the site of leak from the dura and are likely false localising sign.
Some contrast is seen within the subdural space in the lower lumbar spine, which relates to the initial contrast injection during fluoroscopy.