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. Support Radiopaedia and see fewer ads. Updating… Please wait. Unable to process the form. Check for errors and try again. Thank you for updating your details.

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A ortoiliac occlusive disease refers to complete occlusion of the aorta distal to the renal arteries. When the clinical triad of impotence, pelvis and thigh claudication, and absence of the femoral pulses are present, it may also be called Leriche syndrome , which usually affects younger year old males 9.

Aortoiliac occlusive disease is more common in the elderly with an advanced atherosclerotic disease. In chronic onset cases, mostly in arteriosclerosis, symptoms may include erectile dysfunction or impotence, claudication and absence of femoral pulses The anatomical location of atheromatous lesions influence the classification and treatment choice 12 :.

The condition can be acute or chronic. There is endothelial damage resulting in inflammation and lipid accumulation in the tunica media and macrophages eventually leading to plaque formation and occlusive disease Complete infra-renal aortoiliac occlusion will display significant collateral circulation sustained by multiple anastomoses allowing reconstitution with the distal femoral arteries Most often the occlusion occurs near the aortic bifurcation.

It typically begins at the distal aorta or common iliac artery origins and slowly progresses proximally and distally over time. An extensive network of collateral parietal and visceral vessels may form to bypass any segment of the aortoiliac arterial system. CT angiography is usually the best modality for assessment.

In patients where CT is not possible, contrast-enhanced MR angiography may be a good option 4. It allows direct anatomical visualization of the location of the stenosis and occlusion. It also permits the assessment for the presence of a concomitant occlusive disease affecting visceral arteries, the type and extent of collateralization, and the level of the most proximal and distal arterial segments amenable to stent-graft placement.

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Vascular and interventional radiology, the requisites. Mosby Inc. Read it at Google Books - Find it at Amazon. Edit article Share article View revision history Report problem with Article. URL of Article. Article information. System: Vascular. Tags: vascular , syndrome. Synonyms or Alternate Spellings: Leriche syndrome Aorto-iliac occlusive disease. Support Radiopaedia and see fewer ads. Cases and figures. Case 1: with unrelated urothelioma Case 1: with unrelated urothelioma. Case 2 Case 2.

Case 3 Case 3. Case 4 Case 4. Case 5 Case 5. Case 6 Case 6. Case 7 Case 7. Case 8 Case 8. Case 9 Case 9. Case 10 Case Case treated with aortobifemoral bypass Case treated with aortobifemoral bypass. Case treated with axillofemoral bypass Case treated with axillofemoral bypass. Case 13 Case Case 14 Case Case 15 Case Case 16 Case Imaging differential diagnosis.

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Aortoiliac occlusive disease

Aorto-iliac occlusive arterial disease or Leriche's syndrome. ISSN Aortoiliac occlusive disease AIOD or Leriche's syndrome is a form of peripheral arterial disease in which there is occlusion of the iliac arteries starting at the aorto- iliac bifurcation. Clinical manifestation are variable, with intermittent claudication being the most frequent; nevertheless, it is usually underdiagnosed because of its chronicity and the sedentarism of the elderly, the age group that is most frequently affected.


In medicine , aortoiliac occlusive disease , is a form of central artery disease involving the blockage of the abdominal aorta as it transitions into the common iliac arteries. Classically, it is described in male patients as a triad of the following signs and symptoms :. This combination is known as Leriche syndrome. However, any number of symptoms may present, depending on the distribution and severity of the disease, such as muscle atrophy, slow wound healing in the legs, and critical limb ischemia. The physical examination usually shows weakened femoral pulses and a reduced ankle-brachial index. Another technique is digital subtraction angiography which allows verification of the diagnosis and endovascular treatment in a single session. The presence of collateral arteries in the pelvic and groin area is important in maintaining crucial blood flow and lower limb viability.





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