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Medical Definition of Rib notching
1. A smooth defect in the lower border of one or more upper ribs caused by enlarged intercostal collateral vessels, most often a sign of coarctation of the aorta. (05 Mar 2000)
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1. A smooth defect in the lower border of one or more upper ribs caused by enlarged intercostal collateral vessels, most often a sign of coarctation of the aorta. (05 Mar 2000)