Early reherniation of disk material in eleven dogs with surgically treated thoracolumbar intervertebral disk extrusion
- PMID: 22103469
- DOI: 10.1111/j.1532-950X.2011.00920.x
Early reherniation of disk material in eleven dogs with surgically treated thoracolumbar intervertebral disk extrusion
Abstract
Objective: To report findings and outcomes of dogs with reherniation of nuclear material within 7 days of hemilaminectomy for acute thoracolumbar (TL) intervertebral disk extrusion.
Study design: Retrospective case series.
Animals: Chondrodystrophic dogs (n = 11).
Methods: Dogs with acute neurologic decline within 1 week of surgical decompression for TL disk extrusion were identified. Advanced imaging was used to document extradural spinal cord compression at the previous surgery site. Ten dogs had a 2nd decompressive surgery to remove extruded nuclear material.
Results: All dogs had acute neurologic deterioration (average, 2 neurologic grades) 2-7 days after initial hemilaminectomy. Computed tomography (CT; n = 10) or myelography (n = 1) documented extradural spinal cord compression compatible with extruded disk material at the previous hemilaminectomy site. Dogs that had a 2nd surgical decompression improved neurologically within 24 hours and were paraparetic at discharge. The single dog that did not have decompressive surgery did not regain deep nociception during 185-day follow-up.
Conclusions: Early reherniation at the site of previous hemilaminectomy can produce acute deterioration of neurologic function and should be investigated with diagnostic imaging. Repeat decompressive surgery can lead to functional recovery.
© Copyright 2011 by The American College of Veterinary Surgeons.
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