title: Spontaneous resolution of isolated Chiari I malformation.
abstract: BACKGROUND
  Spontaneous resolution of Chiari I abnormality is very rare. In most patients, the radiological abnormality either stays unchanged with time or deriorates.
  
  
  METHODS
  We present a male patient who was diagnosed at the age of 18 months as having radiological evidence of Chiari I malformation without syringomyelia, which had resolved 5 years later on a subsequent MR scan. At the time of initial diagnosis, he had been experiencing recurrent jerking movements of his body and was a sufferer of chronic renal failure.
  
  
  CONCLUSIONS
  The symptoms were thought to be unrelated to the hindbrain hernia. Such spontaneous resolution of an isolated Chiari I malformation has only been described once more before, although resolution of hindbrain hernia associated with syringomyelia has been described before in several cases, albeit at single figures. The mechanism for such a natural evolution is not clear.
  
  
  CONCLUSIONS
  This patient demonstrates that surgical treatment should not be considered hastily in patients with radiological evidence of Chiari I in the absence of convincing associated clinical symptoms.
authors.affiliation: Department of Neurosurgery, Birmingham Children's Hospital, Steelhouse Lane, Birmingham, B4 6NH, UK.
authors.forename: N S
authors.initials: NS
authors.lastname: Jatavallabhula
authors.forename: J
authors.initials: J
authors.lastname: Armstrong
authors.forename: S
authors.initials: S
authors.lastname: Sgouros
authors.forename: W
authors.initials: W
authors.lastname: Whitehouse
mesh_terms: D000293:Adolescent; D001139:Arnold-Chiari Malformation / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D002531:Cerebellum / Q000473:pathology; D019299:Decompression, Surgical; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D012075:Remission, Spontaneous