Takayasu Arteritis

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Figure 1

History: 47-year-old Korean female with known history of Takayasu arteritis and bilateral iliac stents for stenoses. Follow-up aorto iliac CT angiogram was performed at Main Street Radiology utilizing a 16-detector spiral CT.


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Figure 2

Findings: 3D CT angiography images were generated with and without the skeleton (Figures 1 and 2). Lateral view of the abdominal aorta (Figure 3) demonstrates focal stenosis (arrow). Frontal view of the iliac arteries (Figure 4) shows occlusion of the left iliac stent and common femoral artery (yellow arrows), and near complete occlusion of the right common femoral artery (green arrow). Collateral vessels are present bilaterally (white arrows).


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Figure 3

Discussion: Takayasu arteritis is an idiopathic granulomatous inflammatory process affecting the aorta, major aortic branches, and pulmonary artery. It usually affects young (<50 y.o.) females (8:1 F:M) from East Asia. Long or short segmental stenoses are present, especially near the origins of major branches. Fusiform or saccular aneurysms can also be seen in 10-15% of the cases. MSR is the first facility in Queens to install a 16-detector spiral CT. Due to its unprecedented speed, sub-millimeter images of the entire body can be obtained with a single breath-hold. High-resolution 3D CT angiography can be performed to image virtually any arterial system, including the brain (circle of Willis), coronary arteries, hands, and feet.


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Figure 4