Acute dissection of the abdominal aorta.

A 64-year-old man presented with sudden lower abdominal pain and diffuse lumbago. He was diagnosed as having primary dissection of the abdominal aorta. Entry closure and aneurysmal wall plication was performed, and the subsequent course was satisfactory. Surgical intervention is recommended for patients with abdominal aortic dissection in the infrarenal segment, where the extent of dissection is limited and access is comparatively easy. Enhanced computed tomography is useful both in diagnosis and follow-up of this aortic disease.