Possible causes are: Degenerative Myelopathy, meningomyelitis, diskospondylitis, hemivertebra, neoplasms (tumors), cysts, fibrocartilaginous embolism (secondary to fractures), aortic tromboembolism, hyperadrenocorticism or Cushing Syndrome,& as you can see the causes are diverse and some of them quite serious, so it's ...