Imaging diagnosis--postmyelographic epidural leakage due to increased meningeal permeability.

History and Physical Findings The dog had acute pain in the hind quarters and a mild lameness in the right hind leg for 48 h. When examined, there was loss of conscious proprioception, paralysis, and hyperreflexia of both hind legs, with loss of superficial and retention of deep pain. The panniculus reflex was absent at approximately the tenth thoracic vertebra (T10). There was some ataxia present in the forelimbs, but forelimb reflexes were normal as was the presence of superficial and deep pain. There was urine dribbling and increased ease in expressing the urinary bladder. The neurological examination was consistent with a spinal cord lesion between T10 and L6.