What symptoms would a patient exhibit with severe stenosis of both the right and left internal iliac arteries?

Bilateral Internal Iliac Artery Stenosis: Clinical Presentation

Patients with severe bilateral internal iliac artery stenosis typically present with bilateral buttock, hip, and thigh claudication during exercise, which resolves with rest, and may have normal femoral pulses and ankle-brachial indices that can mislead clinicians away from a vascular diagnosis. 1

Primary Symptom Pattern

Buttock and proximal thigh claudication is the hallmark presentation of internal iliac artery occlusive disease:

• Bilateral buttock pain or discomfort that occurs with walking or exertion and resolves with rest 1, 2
• Hip and thigh claudication extending from the buttocks down the proximal thigh 1, 3
• Symptoms are exercise-induced and relieved by rest, consistent with intermittent claudication 1

Associated Symptoms

Additional manifestations may include:

• Erectile dysfunction in male patients, particularly when bilateral internal iliac disease is present 3
• Calf claudication may coexist if there is concurrent disease in other arterial segments 3
• Symptoms typically absent at rest in isolated internal iliac stenosis without critical limb ischemia 1

Critical Diagnostic Pitfall

The most important clinical caveat is that isolated internal iliac artery stenosis can present with normal lower extremity pulses and normal ankle-brachial indices, which may falsely direct clinicians away from a vascular etiology 1, 4. The ACC/AHA guidelines specifically note that arterial imaging should be considered even with normal post-exercise ABI when isolated internal iliac artery occlusive disease is suspected 1.

Physical Examination Findings

• Femoral pulses may be normal or only slightly diminished despite severe internal iliac stenosis 4
• Dorsalis pedis and posterior tibial pulses are typically preserved in isolated internal iliac disease 4
• Femoral bruits may be present due to turbulent flow from stenoses 1

Severity Spectrum

The severity of symptoms depends on the degree of stenosis and collateral circulation:

• Mild to moderate stenosis: May remain asymptomatic or cause only mild claudication 5
• Severe stenosis (>75-90%): Produces significant buttock and thigh claudication that limits walking distance 5, 2
• Critical limb ischemia is rare with isolated internal iliac disease but can occur with severe bilateral disease and poor collaterals, presenting with rest pain, ulcers, or gangrene 5

Clinical Recognition Algorithm

When evaluating proximal lower extremity claudication:

1. Consider internal iliac stenosis when buttock/hip/thigh symptoms predominate over calf symptoms 1
2. Do not exclude vascular disease based on normal femoral pulses or normal ABI alone 1, 4
3. Obtain cross-sectional imaging (CTA or MRA pelvis with runoff) when clinical suspicion exists despite normal noninvasive studies 1, 6
4. Assess for associated erectile dysfunction in male patients as a clue to bilateral internal iliac involvement 3