Spontaneous infrarenal abdominal aortic dissection (SIAAD) is rare. Patients with SIAAD may be asymptomatic or may present with abdominal pain or lower extremity ischemia. We describe a case report of a patient with SIAAD who presented with claudication. We reviewed the English literature on this disorder and specifically evaluated the differences between patients on the basis of their presenting symptoms. Patients who had SIAAD and lower extremity ischemia were more likely to have the dissection process extend into the iliac or femoral artery and were less likely to have an associated abdominal aortic aneurysm. Aortic rupture in the presence of SIAAD was associated with increased risk of death.
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