“…Of these cases, 3 involved patients who had undergone ventricu loperitoneal (VP) shunt placement, 31,37,42 3 cases were postcraniotomy, 26,36,43 17 were posttrauma, 1,4,5,7,8,13,17,20,21,24,29,30,34,35,[39][40][41] and in 12 cases the SDH arose spontaneous ly. [9][10][11]16,18,22,25,28,30,38,44,45 Leakage of intracranial SDH fluid into the spinal subdural space may be involved in patients who manifest spinal SDH after VP shunt placement. Low CSF pressure is a risk factor for spinal SDH 13,15,26,43 in the absence of intracranial SDH extension, and low CSF pressure syndrome elicited by the overflow of CSF in the VP shunt may result in concomitant hemorrhages.…”