Spinal arachnoiditis ossificans.
D001099:Arachnoid / Q000601:surgery*; D001100:Arachnoiditis / Q000601:surgery*; D006801:Humans; D009999:Ossification, Heterotopic / Q000601:surgery; D013118:Spinal Cord Diseases / Q000601:surgery*; D013904:Thoracic Vertebrae