title: Spontaneous regression of lumbar Hansen type 1 disk extrusion detected with magnetic resonance imaging in a dog.
abstract: METHODS
  A 3-year-old French Bulldog was evaluated because of acute signs of back pain and spastic paraparesis.
  
  
  RESULTS
  Neuroanatomic localization indicated a lesion in the T3-L3 spinal cord segment. Magnetic resonance imaging revealed extradural spinal cord compression at the ventral right aspect of the intervertebral disk space L3-4. On the basis of these findings, a diagnosis of sequestrated Hansen type 1 disk extrusion without extradural hemorrhage was made.
  
  
  RESULTS
  The dog was treated conservatively with cage rest, restricted exercise on a leash, and NSAIDs. Results of follow-up examination 5 weeks later indicated complete resolution of clinical signs, and results of repeated MRI indicated a 69% reduction in the volume of the herniated disk material.
  
  
  CONCLUSIONS
  Findings for the dog of this report indicated spinal cord compression attributable to extruded intervertebral disk material resolved. Functional improvements in dogs with such problems may be partly attributable to spontaneous regression of intervertebral disk extrusions.
authors.affiliation: Section of Neurology, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland.
authors.forename: Frank
authors.initials: F
authors.lastname: Steffen
authors.forename: Patrick R
authors.initials: PR
authors.lastname: Kircher
authors.forename: Matthias
authors.initials: M
authors.lastname: Dennler
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D004283:Dog Diseases / Q000175:diagnosis / Q000188:drug therapy / Q000473:pathology*; D004285:Dogs; D007405:Intervertebral Disc Displacement / Q000175:diagnosis / Q000628:therapy / Q000662:veterinary*; D008297:Male; D013117:Spinal Cord Compression / Q000473:pathology / Q000628:therapy / Q000662:veterinary*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal