Features of ruptured abdominal aortic aneurysm on CT

Abdominal aortic rupture

Retroperitoneal hematoma

Indistinct aortic wall

Retroperitoneal stranding

Loss of fat plane between the aorta and surrounding tissue

Extravasation of contrast

"Impending" rupture

Crescent sign - layering hematoma

Aortic blebs

Draping of the aorta over a vertebral body

Irregular aortic wall

Breaks in calcification of the aortic wall

Localized areas of higher attenuation within mural thrombus

CT: computed tomography.

Source: Chien DK, Chang WH, Yeh YH. Radiographic findings of a ruptured abdominal aortic aneurysm. Circulation 2010; 122:1880.

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