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Medical Term:

supernumerary kidney


Definition: a kidney, in addition to the two usually present, developed from the splitting of the nephrogenic blastema or from a separate metanephric blastema, into which a partial or complete duplication of the ureteral stalk enters to form a separate, capsulated kidney; in some cases, the separation of the duplicated organ is incomplete.

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.