title: Cerebellar tonsillar herniation after weight loss in a patient with idiopathic intracranial hypertension.
abstract: Acquired cerebellar tonsillar herniation is a known complication of lumboperitoneal shunt (LPS) for any indication, including idiopathic intracranial hypertension (IIH), also known as pseudotumor cerebri.(1) While the underlying pathophysiology of IIH remains unknown, increasing body mass index is a clear risk factor for the development of IIH. We describe an obese patient with IIH unresponsive to LPS who developed symptoms of intracranial hypotension and cerebellar tonsillar herniation after bariatric surgery and a 50-kg weight loss.
authors.affiliation: NYU School of Medicine, Department of Neurology, Bellevue Hospital Center (BH), New York, NY, USA.
authors.forename: Jerome J
authors.initials: JJ
authors.lastname: Graber
authors.forename: Rikki
authors.initials: R
authors.lastname: Racela
authors.forename: Katherine
authors.initials: K
authors.lastname: Henry
mesh_terms: D000293:Adolescent; D015984:Causality; D002531:Cerebellum / Q000000981:diagnostic imaging / Q000473:pathology; D002557:Cerebrospinal Fluid Shunts / Q000009:adverse effects / Q000379:methods; D004677:Encephalocele / Q000209:etiology / Q000503:physiopathology* / Q000601:surgery; D005260:Female; D005743:Gastrectomy / Q000009:adverse effects*; D020773:Headache Disorders / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D007049:Iatrogenic Disease; D009767:Obesity, Morbid / Q000150:complications / Q000503:physiopathology* / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology / Q000473:pathology / Q000503:physiopathology*; D011559:Pseudotumor Cerebri / Q000209:etiology / Q000503:physiopathology* / Q000601:surgery; D013346:Subarachnoid Space / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D017287:Ventriculoperitoneal Shunt; D015431:Weight Loss / Q000502:physiology