title: Delayed hydrocephalus associated with traumatic atlanto-occipital dislocation: Case report and literature review.
abstract: BACKGROUND
  Traumatic atlanto-occipital dislocation (AOD) is a rare but often fatal injury. Consequently, long-term data regarding surviving patients have been limited. In particular, the occurrence of hydrocephalus is not well-documented.
  
  
  METHODS
  A 33-year-old male sustained AOD as a consequence of a motor vehicle collision. Although he did well initially after an occipitocervical fusion, 1 month after his operation, he exhibited signs of increased intracranial pressure (bilateral abducens nerve palsies, worsening headaches, and fatigue). He was found to have hydrocephalus, which was responsive to shunting.
  
  
  CONCLUSIONS
  Manifestations of hydrocephalus after AOD can be variable, ranging from interval ventricular dilatation to pseudomeningoceles and syringomyelia. In addition, the timing of presentation can be acute, requiring emergent external ventricular drainage, or delayed, requiring ongoing vigilance. Consequently, as more patients survive this once thought to be fatal injury, caution for hydrocephalus is stressed.
authors.affiliation: Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
authors.forename: Ashish
authors.initials: A
authors.lastname: Sharma
authors.affiliation: Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
authors.forename: Ha Son
authors.initials: HS
authors.lastname: Nguyen
authors.affiliation: Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
authors.forename: Abhishiek
authors.initials: A
authors.lastname: Sharma
authors.affiliation: Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Lozen
authors.affiliation: Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
authors.forename: Shekar
authors.initials: S
authors.lastname: Kurpad
keywords: Atlanto-occipital dislocation; hydrocephalus; occipitocervical fusion