title: Tonsillar herniation.
authors.forename: Mark
authors.initials: M
authors.lastname: ter Laan
authors.forename: Eelco W
authors.initials: EW
authors.lastname: Hoving
mesh_terms: D001139:Arnold-Chiari Malformation / Q000601:surgery*; D002555:Cerebrospinal Fluid; D002557:Cerebrospinal Fluid Shunts; D004322:Drainage / Q000009:adverse effects / Q000379:methods*; D004677:Encephalocele / Q000209:etiology*; D006801:Humans; D007430:Intraoperative Care; D008161:Lumbosacral Region