“…(7) PR secondary to trauma is uncommon in the literature, and may occur due to causes such as: traumatic brain injury, cervical, thoracic, abdominal, and pelvic injuries and may result from penetrating spinal cord injuries by a firearm or sharpener. (3,7,9) Air can enter the spinal canal directly or indirectly, the first mainly of traumatic or penetrating origin; And the second by dissection of the soft paraspinals by a unidirectional valve mechanism until reaching the spinal canal. (4) Generally, this air within the cord does not migrate and is spontaneously reabsorbed into the bloodstream for several days without relapse.…”