title: Definitions and Anatomic Considerations in Chiari I Malformation and Associated Syringomyelia.
abstract: Current understanding of the hindbrain hernias known as Chiari I malformations is based on more than 100 years of pathologic and clinical experience. Over time, the definition of this finding has been analyzed and altered. The term Chiari I malformation is currently used to describe tonsillar ectopia in a wide range of patients with varying embryonic derailments. This article discusses this malformation, its various definitions, and varied anatomic traits. In addition, the morphology of the commonly associated syringomyelia is reviewed.
authors.affiliation: Seattle Science Foundation, 550 17th Ave #600, Seattle, WA 98122, USA. Electronic address: shane.tubbs@childrensal.org.
authors.forename: R Shane
authors.initials: RS
authors.lastname: Tubbs
mesh_terms: D001139:Arnold-Chiari Malformation / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D002490:Central Nervous System / Q000473:pathology*; D019299:Decompression, Surgical; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D009421:Nervous System Malformations / Q000150:complications / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D013595:Syringomyelia / Q000150:complications / Q000175:diagnosis / Q000473:pathology*
keywords: Anatomy; Chiari malformation; Hindbrain hernia; Neurosurgery; Syrinx; Tonsillar ectopia