title: Delayed intraventricular tension pneumocephalus due to scalp-ventricle fistula: a very rare complication of shunt surgery.
abstract: BACKGROUND
  Although pneumocephalus and pneumoventricle are well known entities in neurosurgery practice, delayed intraventricular tension pneumocephalus following shunt surgery is extremely rare.
  
  
  METHODS
  A 60-year-old man presented with vomiting, drowsiness, walking difficulty, urinary incontinence and headache one month after shunt placement for communicant hydrocephalus developing secondary to aneurysmal subarachnoid hemorrhage. Skull X- Rays and Computed Tomography (CT) revealed marked air in both lateral ventricles. Neither physical and neurological examinations nor laboratory studies and cerebrospinal fluid evaluations suggested central nervous system infection. He gradually improved after repairing the scalp incision defect above the previously opened burr-hole and bed rest.
  
  
  CONCLUSIONS
  In contrast to reported cases with delayed pneumocephalus developing after shunting, air entry was in skull base, air source was the scalpventricular fistula in the present case.
authors.affiliation: Bakirköy Research and Training Hospital for Neurology, Neurosurgery and Psychiatry, 2nd Neurosurgery Clinic, Istanbul, Turkey. bekirtugcu@superonline.com
authors.forename: Bekir
authors.initials: B
authors.lastname: Tuğcu
authors.forename: Osman
authors.initials: O
authors.lastname: Tanriverdi
authors.forename: Omür
authors.initials: O
authors.lastname: Günaldi
authors.forename: Serhat
authors.initials: S
authors.lastname: Baydin
authors.forename: Lütfi Sinasi
authors.initials: LS
authors.lastname: Postalci
authors.forename: Hidayet
authors.initials: H
authors.lastname: Akdemir
mesh_terms: D002557:Cerebrospinal Fluid Shunts / Q000009:adverse effects*; D005402:Fistula / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000601:surgery*; D020547:Lateral Ventricles / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011007:Pneumocephalus / Q000000981:diagnostic imaging / Q000209:etiology*; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011859:Radiography; D012535:Scalp / Q000000981:diagnostic imaging; D019291:Skull Base; D013345:Subarachnoid Hemorrhage / Q000150:complications / Q000601:surgery; D020542:Third Ventricle / Q000000981:diagnostic imaging