title: Congenital formation of an intraspinal osseous vertebral ring causing spinal cord compression.
abstract: METHODS
  A unique case of the congenital formation of an intraspinal osseous vertebral ring causing spinal cord compression is reported.
  
  
  OBJECTIVE
  To our knowledge, such an osseous ring has not yet been described. The authors detail the clinical presentation, imaging, and treatment of the intraspinal osseous ring.
  
  
  BACKGROUND
  There are two traditional categories of congenital vertebral anomalies, that of failure of formation and of segmentation. The authors propose that this ring may not fit into either of these categories and may represent a new category of failure of migration.
  
  
  RESULTS
  Surgical decompression using a costotransversectomy approach was performed. Adequate decompression the spinal cord was achieved. Anterior and posterior fusions with instrumentation were used to stabilize the spinal cord.
  
  
  CONCLUSIONS
  An intraspinal osseous vertebral ring is a unique anomaly that, to our knowledge, has not been reported to date. The authors discuss the pathology, imaging, and treatment of this unique condition.
authors.affiliation: University of Pennsylvania, School of Medicine, Philadelphia, PA, USA. Jlanda@mail.med.upenn.edu
authors.forename: Joshua
authors.initials: J
authors.lastname: Landa
authors.forename: Albert E
authors.initials: AE
authors.lastname: Telfeian
authors.forename: Denis S
authors.initials: DS
authors.lastname: Drummond
mesh_terms: D002648:Child; D019299:Decompression, Surgical / Q000379:methods; D005260:Female; D006801:Humans; D013115:Spinal Canal / Q000002:abnormalities* / Q000601:surgery; D013117:Spinal Cord Compression / Q000209:etiology* / Q000601:surgery; D013123:Spinal Fusion / Q000379:methods; D013904:Thoracic Vertebrae / Q000002:abnormalities* / Q000601:surgery; D016896:Treatment Outcome