Case 5, spiral CT of the skull base and the upper cervical spine after contrast medium application via the side port of the baclofen pump: The tube system was intact up to the intraspinal entry of the tube at the level of L4/L5, without evidence of leakage. Contrast medium distribution presents epidurally dorsal to the CSF space at C2 (long arrow), pushing between the dural sheets of the tentorium (short arrow). There is no evidence of intrathecal contrast medium