Man With Sudden Paralysis: Insidious Spinal Cord Infarction due to a Non-Ruptured Abdominal Aortic Aneurysm

Abstract

Background: Acute infarctions of the spinal cord are rare events characterized by sudden paralysis or sensory deficits below the level of injury. Etiologies include spinal cord trauma, vascular injury, arterial dissection, thromboembolic disease, chronic inflammatory conditions, or mass effect on the spinal cord.

Case report: A 63-year-old male presented to the emergency department with sudden-onset bilateral leg numbness and weakness. His physical examination was notable for decreased light touch and temperature sensation and bilateral lower-extremity paresis. Initial magnetic resonance imaging (MRI) of his spine did not show cord injuries. Computed tomography angiography of his chest, abdomen, and pelvis demonstrated a 7.5-cm non-ruptured infrarenal abdominal aortic aneurysm (AAA) extending into bilateral iliac arteries. The patient was diagnosed with clinical spinal cord infarction secondary to a thromboembolic event from his AAA. A repeat MRI 15 h later showed spinal cord infarction from T8 down to the conus. He received an endovascular aortic repair and was ultimately discharged to rehabilitation with slightly improved lower-extremity strength. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Atraumatic cord syndrome is exceedingly rare and is associated with dissection or complication of aortic aneurysm repair. There are very few reported cases of thrombotic events leading to ischemic cord syndrome. When presented with a patient with symptoms consistent with cord syndrome in the absence of trauma or mass effect on the spinal cord, providers should work up for vascular etiology.

Keywords: abdominal aortic aneurysm; imaging; ischemic cord syndrome; stroke.