Neurology Resident University of Missouri College of Veterinary Medicine Columbia, Missouri, United States
Abstract: Background - Medical management and surgical interventions of thoracolumbar malformations have reported varied outcomes. Previous surgical techniques describe decompression and stabilization. We describe a technique of open decompression without implant stabilization.
Hypothesis - Combined extensive thoracic epaxial muscle elevation and periosteal stripping will improve spinal alignment and improve neurologic function.
Objectives - To evaluate the outcomes in dogs after surgery based on neurologic status, owner perception, and vertebral Cobb angle.
Animals - Thirty-six client owned dogs underwent surgery between 2006 and 2025. Majority of dogs were brachycephalic breeds (n=33) aged 3 months – 7 years.
Methods - Multi-center, retrospective, observational study. Dogs with T3-L3 myelopathy, surgical procedure performed and follow up evaluations were included. Signalment, duration of clinical signs, diagnostic imaging, surgery reports, and owner questionnaire follow up were evaluated.
Results - Cobb angle before surgery was available in 32 cases with a median angle of 48.65 (16.92-86). Cobb angle post operatively was available in 14 cases with a median angle of 56.50 (10.21-82). The median difference between post and pre-procedure Cobb angle measured -2.00 (-12.17-22 CI: -4.78, 9.35) was not different (p-value 0.800). Modified Frankel Score before surgery was grade 2 in 26 dogs and grade 3 in 10 dogs. In dogs with follow-up examinations (2 weeks – 6 years), 2 improved, 2 worsened, and 19 remained static.
Conclusions and Clinical Importance - Majority of dogs remained static or improved. Spinal alignment did not change suggesting stability may be more of a factor than compression in affected spinal columns.
