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Click Axial images from from initial contrast enhanced CT scan show normal appearing gallbladder. Please also note an intimal flap, from aortic dissection, which is visible within the lumen of the abdominal aorta.

Click Axial images from follow-up contrast enhanced CT study, performed 12 hours later, shows opacified gallbladder with dependent filling defects representing low attenuation gallstones. The aortic dissection was unchanged.

Click Subsequent ultrasound examination of gallbladder confirms presence of gallstones. One stone is seen floating in the gallbladder consistent with a cholesterol stone.