Multiple cervical spondylolisthesis and thoracic vertebral malformation in an 11 month-old Chilean Caballo Raza Chilena colt

Cristóbal Dorner, Javiera Encalada, Jorge Maldonado, Joanie Palmero
2022 Austral journal of veterinary sciences  
Compressive myelopathy caused by developmental cervical and thoracic malformation was diagnosed in an 11-monthold Chilean Caballo Raza Chilena colt. The patient evidenced an abnormal wide-based stance, neck muscle atrophy, upside-down neck conformation and tetra ataxia. Ataxia was exacerbated when the colt was walked down and uphill, walked with elevated head, backing and turning in tight circles. The patient showed no improvement following medical therapy, therefore, the colt was euthanised
more » ... to a poor prognosis after myelogram findings. Cervical spine malalignment (spondylolisthesis) associated with multi-level compression of the spinal cord was suspected based on cervical radiographs and myelogram findings and was confirmed postmortem. Thoracic vertebral malformation retained cartilage matrix spicules and a flare of the cranial vertebral epiphysis of the first thoracic vertebrae (T1) were also diagnosed at necropsy.
doi:10.4067/s0719-81322022000100037 fatcat:rzaxzhlj4zhv5fdpvk2ftskbwe