Reverse figure 3 sign

The reverse figure 3 sign (also known as the E sign) is seen on barium swallows in patients with a coarctation of the aorta and is the medial equivalent of the figure 3 sign seen on plain chest radiographs. It is formed by prestenotic dilatation of the ascending aorta, indentation of the coarctation site (or "tuck"), and post-stenotic dilatation of the descending aorta.  

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Article information

rID: 6276
Section: Signs
Tag: refs, cases
Synonyms or Alternate Spellings:
  • E sign

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