Tearing of the dura mater in three dogs

Tearing of the thoracolumbar dura mater was diagnosed after myelography in three large breed dogs. All three dogs lost the ability to walk suddenly, a fter a period of vigorous running or struggling. Radiographic changes sugge sted that the tearing of the dura was associated with intervertebral disc i njury in two dogs. These dogs regained the ability to walk after medical tr eatment. Postmortem findings suggested that the tearing of the dura mater i n the third dog was associated with nerve root injury and spinal cord haemo rrhage after an episode of violent struggling.