Intermittent claudication, pallor, and pain on lower limbs.
CT Abdomen and pelvis
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Severe atheromatous disease along the abdominal aorta with infrarenal segment occlusion by thrombus, which extends to common iliac arteries. Collateral circulation is noted between the SMA and IMA via what seems to represent an Arc of Riolan (although it shows a short segment running close to the left colon that resembles a marginal artery).
Leriche syndrome refers to the symptoms related to a complete occlusion of the aorta distal to the renal arteries.