| reversed three sign |
a pair of indentations, one on either side of the aortic knuckle, seen on barium contrast imaging of the esophagus and representing mirror images of a figure three sign; it signifies coarctation of the aorta. Called also E s.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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