Atlanto‐occipital fracture: Intrathecal corticosteroid medication of the subarachnoid space—A novel treatment method.

Summary: This case report describes the successful conservative management of a comminuted fracture of the atlas and occiput involving the atlanto‐occipital joint. To the authors' knowledge, treatment of fractures involving the atlanto‐occipital joint in the horse and intrathecal subarachnoid space corticosteroid injection in the standing sedated patient has not been previously reported. Clinical signs following atlanto‐occipital (AO) fracture included acute onset ataxia, proprioceptive deficits and neck stiffness; which developed immediately post‐trauma during head and tail rope‐assisted recovery from general anaesthesia. Radiographic examination was not diagnostic immediately post‐trauma and computed tomography (CT) imaging subsequently identified articular fractures of the atlas and occiput. Treatment included ultrasound‐guided intrathecal medication of the subarachnoid space and intra‐articular medication of the left AO joint under standing sedation. Medication resulted in a marked improvement in clinical signs (grade 4 ataxia to grade 1 ataxia) and a return to ridden exercise 12 months post‐injury. [ABSTRACT FROM AUTHOR]