Bilateral Lower Limb Claudication, Erectile Dysfunction, and Trophic Changes

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CLINICAL MCQ — INTERNAL MEDICINE
A 55-year-old smoker, non-diabetic, normotensive man presents with pain in the calf, thigh, and buttock on walking, relieved by rest. He has erectile dysfunction for the last 3 months. Examination shows reduced hair distribution, atrophic skin changes, and coldness of both lower limbs.

What is the most likely diagnosis?
✅ EXPLANATION — CLINICAL MCQ
✓ Correct Answer: E) Leriche Syndrome (Aortoiliac Occlusive Disease)
What is Leriche Syndrome?

Leriche syndrome results from chronic occlusion of the infrarenal aorta and/or iliac arteries, most commonly due to atherosclerosis. It classically presents with a triad of symptoms in middle-aged male smokers.

Classic Triad of Leriche Syndrome
  • 🦵 Bilateral claudication — calf, thigh, and buttock pain on walking, relieved by rest
  • 🔴 Erectile dysfunction — due to reduced blood flow to internal iliac arteries
  • ❄️ Absent or reduced femoral pulses — with trophic changes (cold limbs, hair loss, atrophic skin)
    • Why This Patient?

    This 55-year-old male smoker presents with all three classic features: bilateral buttock and thigh claudication, erectile dysfunction for 3 months, and bilateral lower limb trophic changes (reduced hair, atrophic skin, coldness). Smoking is the single most important risk factor for aortoiliac occlusive disease.

    ✗ Why Other Options Are Wrong
  • A) Diabetic peripheral neuropathy — Patient is non-diabetic. Neuropathy causes burning/tingling, not claudication relieved by rest.
  • B) Lumbar spinal stenosis — Causes neurogenic claudication (relieved by sitting/bending forward), no erectile dysfunction or vascular trophic changes.
  • C) Buerger's disease — Affects young male smokers but involves small/medium vessels; does not typically cause aortoiliac-level occlusion or bilateral buttock claudication.
  • D) Atherosclerotic PAD — Related but too general. The specific combination of bilateral buttock claudication + erectile dysfunction defines Leriche syndrome.
    • 💡 Key Point: In any male smoker with bilateral buttock claudication + erectile dysfunction — think Leriche Syndrome first. It is a surgical emergency if limb ischemia is critical, treated by aortobifemoral bypass or endovascular stenting.
    ❓ FAQ — Leriche Syndrome
    Q1. What is Leriche Syndrome?
    Leriche syndrome is chronic occlusion of the infrarenal abdominal aorta and/or common iliac arteries, most commonly due to atherosclerosis, causing a classic triad of bilateral lower limb claudication, erectile dysfunction, and absent femoral pulses.
    Q2. What is the classic triad of Leriche Syndrome?
    1) Bilateral calf, thigh, and buttock claudication relieved by rest. 2) Erectile dysfunction due to reduced internal iliac artery flow. 3) Absent or diminished femoral pulses with trophic limb changes.
    Q3. Who is most commonly affected?
    Middle-aged to elderly male smokers are most commonly affected. Smoking is the single most important risk factor. Other risk factors include hypertension, hyperlipidaemia, diabetes mellitus, and obesity.
    Q4. What is the underlying pathology?
    Atherosclerotic plaque formation leads to progressive narrowing and eventual occlusion of the infrarenal aorta and iliac arteries, resulting in chronic ischemia of the lower limbs and pelvic organs.
    Q5. How is Leriche Syndrome diagnosed?
    Diagnosis is clinical (classic triad) and confirmed by Ankle-Brachial Index (ABI <0.9), Doppler ultrasound, CT angiography, or MR angiography, which demonstrate aortoiliac occlusion.
    Q6. What are the trophic changes seen in Leriche Syndrome?
    Chronic ischemia causes reduced hair distribution, atrophic and shiny skin, pallor or cyanosis, coldness of both lower limbs, and in advanced cases, non-healing ulcers or gangrene of the toes.
    Q7. How does Leriche Syndrome differ from Buerger's disease?
    Buerger's disease (Thromboangiitis obliterans) affects young male smokers and involves small to medium-sized vessels of the distal extremities. Leriche syndrome involves the large aortoiliac vessels and presents with proximal (buttock/thigh) claudication and erectile dysfunction.
    Q8. What is the medical management of Leriche Syndrome?
    Medical management includes smoking cessation (most important), antiplatelet therapy (aspirin/clopidogrel), statins, exercise rehabilitation, blood pressure and glucose control, and cilostazol for claudication symptoms.
    Q9. What are the surgical treatment options?
    The gold standard is aortobifemoral bypass grafting. Endovascular options include percutaneous transluminal angioplasty (PTA) with or without stenting of the iliac arteries. Axillobifemoral bypass is used in high surgical risk patients.
    Q10. What are the complications if Leriche Syndrome is untreated?
    Untreated Leriche syndrome can progress to critical limb ischemia, rest pain, non-healing ulcers, gangrene, and limb loss requiring amputation. Cardiovascular events such as myocardial infarction and stroke are also major risks due to widespread atherosclerosis.






    #LericheSyndrome #InternalMedicineMCQ #VascularMedicine #AortoiliacOcclusiveDisease #MedicalQuiz #PeripheralArterialDisease

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