title: Bariatric surgery as a possible risk factor for spontaneous intracranial hypotension.
abstract: OBJECTIVE
  To evaluate a possible link between bariatric surgery and spontaneous intracranial hypotension.
  
  
  METHODS
  The frequency of bariatric surgery was examined in a group of 338 patients with spontaneous intracranial hypotension and compared with a group of 245 patients with unruptured intracranial aneurysms.
  
  
  RESULTS
  Eleven (3.3%) of the 338 patients with spontaneous intracranial hypotension had a history of bariatric surgery compared with 2 (0.8%) of the 245 patients with intracranial aneurysms (p = 0.02). Among the 11 patients with spontaneous intracranial hypotension after bariatric surgery, the mean age at the time of bariatric surgery was 40.8 years (range, 26-53 years) and the mean age at the time of onset of spontaneous intracranial hypotension was 45.6 years (range, 31-59 years). Weight at the time of bariatric surgery ranged from 95 to 166 kg (mean, 130 kg) (body mass index range: 34.9-60.1 kg/m(2); mean: 44.6). Weight at the time of onset of symptoms of spontaneous intracranial hypotension ranged from 52 to 106 kg (mean, 77.5 kg) (body mass index range: 19.2-32.1 kg/m(2); mean: 26.4). The mean weight loss from bariatric surgery to onset of spontaneous intracranial hypotension was 52.5 kg (range, 25-98 kg). Time interval from bariatric surgery to onset of symptoms of spontaneous intracranial hypotension ranged from 3 to 241 months (mean, 56.5 months).
  
  
  CONCLUSIONS
  This case-control study shows that bariatric surgery is a potential risk factor for spontaneous intracranial hypotension.
authors.affiliation: From the Departments of Neurosurgery (W.I.S., A.G.) and Surgery (S.C.), Cedars-Sinai Medical Center, Los Angeles, CA. schievinkw@cshs.org.
authors.forename: Wouter I
authors.initials: WI
authors.lastname: Schievink
authors.affiliation: From the Departments of Neurosurgery (W.I.S., A.G.) and Surgery (S.C.), Cedars-Sinai Medical Center, Los Angeles, CA.
authors.forename: Aimee
authors.initials: A
authors.lastname: Goseland
authors.affiliation: From the Departments of Neurosurgery (W.I.S., A.G.) and Surgery (S.C.), Cedars-Sinai Medical Center, Los Angeles, CA.
authors.forename: Scott
authors.initials: S
authors.lastname: Cunneen
mesh_terms: D000328:Adult; D050110:Bariatric Surgery / Q000009:adverse effects*; D015992:Body Mass Index; D001835:Body Weight; D005260:Female; D006801:Humans; D019585:Intracranial Hypotension / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000601:surgery; D011183:Postoperative Complications / Q000503:physiopathology*; D011446:Prospective Studies; D012189:Retrospective Studies; D012307:Risk Factors