title: Subarachnoid hemorrhage following intranasal procedures.
abstract: Two cases of subarachnoid hemorrhage complicating intranasal ethmoidectomy are presented. In both, the bleeding was initally considered coincidental to the rupture of a congenital aneurysm or an arteriovenous malformation. A direct relationship between the surgical procedure and the subarachnoid hemorrhage only became evident after extensive studies or after delayed development of CSF rhinorrhea, pneumocephalus and meningitis.
mesh_terms: D000328:Adult; D005004:Ethmoid Bone / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009298:Nasal Polyps / Q000601:surgery*; D013345:Subarachnoid Hemorrhage / Q000209:etiology*; D013514:Surgical Procedures, Operative / Q000009:adverse effects*