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. 2020 Jan 6;9:F1000 Faculty Rev-2. [Version 1] doi: 10.12688/f1000research.19826.1

Figure 1. Classification of duplex kidney anatomy.

Figure 1.

Compared with a normal kidney ( a), complete duplication produces a duplex kidney with two poles that drain into two ureters ( b). Incomplete duplication leads to a Y-shaped ureter ( c). Blind ureters do not drain into the bladder ( d). In the rare case of inverted Y-ureteral duplication, two ureters fuse before entering the kidney ( e).