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1. Takayasu disease

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Figure 13-1

Takayasu disease.

A. An anterior contrast-enhanced MR angiography study of a 10-year-old child shows marked narrowing (arrow) of the inferior aspect of the abdominal aorta and the adjacent portions of the common iliac arteries. B. There is prominent signal in the aortic wall (arrow) on this T2-weighted fat-suppressed image.

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2. Takayasu arteritis

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Figure 13-2

Takayasu arteritis.

A, B. Anterior and left lateral volume rendering images of a contrast-enhanced MR study of a 13-year-old child show occlusion of the superior mesenteric and right renal arteries. The celiac, left renal, and inferior mesenteric vessels are patent.

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3. Median arcuate ligament syndrome

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Figure 13-3

Median arcuate ligament syndrome.

A sagittal contrast-enhanced CT image of a 15-year-old girl shows marked narrowing of the celiac artery (arrow) near its origin. Note inferior deviation at the stenotic site, a result of compression by the median arcuate ligament.

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4. Median arcuate ligament syndrome

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Figure 13-4

Median arcuate ligament syndrome.

A. CT shows focal narrowing near the origin of the celiac artery. There is mild post-stenotic dilation. (The apparent defect in the superior mesenteric artery is artifactual.) B. Doppler evaluation of the celiac artery during inspiration shows normal flow. C. Interrogation of the vessel beyond the stenosis during expiration shows dampening of systolic flow.

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5. Marfan disease; aortic root dilation and aneurysm of the aortic arch

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Figure 13-5

Marfan disease; aortic root dilation and aneurysm of the aortic arch.

A gated MR image obtained during systole shows marked sinus of Valsalva dilation (arrows). There is also dilation of the entire arch and of the visualized portions of the innominate and left common carotid arteries.

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6. Marfan syndrome

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Figure 13-6

Marfan syndrome.

A. The frontal view shows prominence of the ascending aorta (right-sided arrow). Dilation and tortuosity of the distal portion of the arch produce a soft-tissue density along the upper left side of the mediastinum. Heart size is normal. B. On the lateral view, the dilated ascending aorta bulges into the retrosternal region (arrows).

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7. Sinus of Valsalva aneurysm

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Figure 13-7

Sinus ...

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