Concomitant Pneumocephalus and Pneumorrhachis after Posterior Fossa Surgery

Pneumorrhachis, the presence of air in the spinal canal, may be caused by diverse pathologies such as incidental durotomy, barotrauma, pneumothorax, and trauma.[1] It is usually asymptomatic, being often noted on radiological investigations, but at times can cause features of cord compression.[2] The occurrence of pneumocephalus is quite common after posterior fossa surgery, but pneumorrhachis is a rare entity despite an existing communication between the cerebral and spinal subarachnoid spaces. We report a case of pneumorrhachis, wherein air was incidentally detected on postoperative scans in a child after posterior fossa surgery. Parent of this child provided written consent for the publication of this letter.