title: Tension pneumocephalus after posterior-fossa craniotomy, a complication of the sitting position.
mesh_terms: D000368:Aged; D000769:Anesthesia, Inhalation; D003388:Cranial Fossa, Posterior / Q000601:surgery*; D003399:Craniotomy; D006801:Humans; D008297:Male; D009609:Nitrous Oxide; D011007:Pneumocephalus / Q000209:etiology*; D011183:Postoperative Complications; D011187:Posture; D012886:Skull / Q000601:surgery*
chemical_list: D009609:Nitrous Oxide