Leriche syndrome is a specific form of peripheral arterial disease (PAD). In this condition, the abdominal aorta—usually just before it branches into the leg arteries—is narrowed or blocked. Doctors refer to this as aortic bifurcation occlusion.
This severely restricts blood flow to the legs. As a result, muscles and tissues are no longer adequately supplied with oxygen—a condition known as ischemia. For those affected, this means pain, limited mobility, and, in advanced stages, a severely reduced quality of life.
Illustration of an aortic bifurcation occlusion in Leriche syndrome—narrowing or blockage of the aorta just before it branches into the iliac arteries.
A warning sign is leg pain when walking that subsides again at rest—a phenomenon known as “intermittent claudication.” Common symptoms include:
- Pain in the buttocks, thighs, or calves while walking
- Sensory disturbances or numbness in the legs or toes
- Cold legs or pale skin
- Erectile dysfunction in men
- In severe cases: sores on the feet that heal poorly
Not all symptoms occur at the same time—especially in the early stages, Leriche syndrome often goes unnoticed.
In most cases, the main cause is atherosclerosis—the hardening and narrowing of the arteries. Deposits of fat, calcium, and connective tissue gradually narrow the blood vessels until they become completely blocked. People with the following conditions are particularly at risk:
Age also plays a role: Leriche syndrome most often occurs in people over 50—men are affected more frequently than women.
Anyone who notices early signs should see a doctor as soon as possible—ideally a vascular specialist (angiologist or vascular surgeon). The diagnosis is made in several steps:
- Physical examination, particularly of the pulses in the legs
- Blood pressure measurement on the arms and legs (ankle-brachial index)
- Doppler ultrasound to visualize blood flow
- Imaging techniques such as CT angiography or MRI angiography to precisely locate the narrowings
Early diagnosis helps prevent complications—such as the progression of ischemia or the risk of thrombosis.
Treatment depends on the severity of the condition. The goal is to restore blood flow to the legs and alleviate symptoms. The following approaches are used:
Conservative treatment:
- Blood-thinning medications
- Blood pressure and blood sugar control
- Smoking cessation and dietary changes
- Walking exercises to stimulate blood circulation
Interventional or surgical treatment:
- Balloon angioplasty, possibly with stent placement
- Bypass surgery, in which a bypass is created
- In severe cases: surgical intervention on the aorta, for example, by implanting a vascular prosthesis
Specialists in the treatment of Leriche syndrome include vascular surgeons, angiologists, and radiologists with experience in interventional therapy.
If left untreated, Leriche syndrome usually worsens steadily. There is a risk of:
With early treatment and consistent lifestyle changes, symptoms can be significantly alleviated and mobility improved. Even after surgery, regular follow-up care is important to prevent relapses.
Leriche syndrome is a serious but highly treatable vascular disease. If you experience leg pain while walking, a sensation of coldness, or numbness, these symptoms should be taken seriously. Early diagnosis and personalized treatment help prevent complications and restore a better quality of life.
Do not hesitate to have a specialist examine you at the first signs—your health and mobility will thank you for it.
Glossary
- Aorta: The main artery that carries blood from the heart to the body
- Atherosclerosis: Calcification and narrowing of the arteries
- Ischemia: Reduced blood flow to tissue, usually caused by narrowing of the blood vessels
- Hypertension: High blood pressure
- PAOD: Peripheral arterial occlusive disease—a circulatory disorder affecting the limbs
How does Leriche syndrome develop, and why is a blockage of the aorta so dangerous?
Leriche syndrome usually develops due to a major vascular occlusion in the infrarenal aorta, often as a result of advanced atherosclerosis or a blood clot. This causes narrowing of the portion of the aorta located just before it branches into the two iliac arteries. This distal occlusion of the aorta significantly reduces blood flow to the lower extremities. Without treatment, this can lead to severe ischemia, tissue damage, and, in extreme cases, the loss of both legs. The condition is named after the French surgeon René Leriche.
What symptoms typically occur, and how do chronic and acute Leriche syndrome differ?
Typical symptoms include pain when walking—known as claudication or intermittent claudication—numbness, coldness in the legs, and erectile dysfunction. In chronic Leriche syndrome involving a prominent iliac artery or an altered testicular artery, a gradual deterioration may occur over the course of years. Acute Leriche syndrome, on the other hand, develops suddenly—for example, due to an embolism—and rapidly leads to extreme reduced blood flow, potentially resulting in ischemia-related complications. Rare case reports even describe ischemia and fulminant gangrene of the lower extremities.
How is Leriche syndrome diagnosed, and what role does angiography play?
Diagnosis involves a clinical examination, blood pressure measurements in the arms and legs, and imaging studies. An angiogram shows the exact course of the occlusion, the aortic bifurcation, and any collateral vessels that may partially compensate for the loss of blood flow. Additional procedures such as CT or MRI angiography provide a more precise visualization of the findings. This allows physicians to determine the extent to which arterial blood flow is reduced and whether the lower extremities already show signs of peripheral arterial disease (PAD).
What treatment options are available, and when is a bypass necessary?
Treatment depends on the stage of the disease. In early stages, walking exercises, blood pressure control, and treatment of risk factors such as obesity or hypertension are often helpful. In cases with severe findings, an interventional or surgical procedure is often necessary. This may involve balloon angioplasty, stents, or bypass surgery. A classic procedure involves the use of a Y-shaped graft to bypass the blocked section of the aorta and restore blood flow to both legs. The goal is always to achieve rapid reperfusion of the tissue.
What are the risks if Leriche syndrome remains untreated?
If left untreated, Leriche syndrome often leads to progressive ischemia, which damages the tissue of the lower extremities. Complications such as poorly healing wounds, infections, or—in severe cases—fulminant gangrene are possible. The renal arteries may also be affected, which carries additional risks. Severely restricted blood flow can lead to irreversible damage, which is why early detection and treatment of the condition are particularly important.
Can Leriche syndrome recur, and how can the risk be reduced?
After successful treatment, a relapse is possible, especially if risk factors such as smoking, high blood pressure, diabetes mellitus, or severely elevated blood lipid levels persist. By consistently managing these factors, engaging in regular exercise, and undergoing close follow-up care by vascular specialists, the risk can be significantly reduced. Treatment for Leriche syndrome typically leads to a significant improvement in blood flow; however, long-term monitoring is necessary to prevent recurrent blockages.
