figure three sign

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figure three sign2016-11-17T22:06:14+00:00

figure three sign

figure_3IMAGING

A descriptive term referring to an indentation of the lateral margin of the aorta accompanied by poststenotic dilation a typical finding in aortic coarctation fancifully likened to number 3.

A “reverse 3” sign can be seen on barium oesophagograms as a result of this anomaly. Other radiographic findings associated with long-standing aortic coarctation are elevation of the left ventricular apex and linear, wavy opacities behind the sternum due to dilated internal mammary arteries.  

Synonyms 3 sign, E sign, figure 3 sign, reversed three sign

Reference http://www.bcm.edu/radiology/cases/pediatric/text/4b-desc.htm

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