Incomplete double ureter

Discussion:

The Committee on Terminology, Nomenclature, and Classification of the Section on Urology of the American Academy of Pediatrics suggests:

  • duplex kidney: the duplex kidney has a single renal parenchyma that is drained by two pyelocaliceal systems
    • upper or lower pole: the poles represent one component of a duplex kidney
    • upper and lower pole ureters: upper and lower pole ureters drain a duplex kidney's upper and lower poles, respectively
  • duplex system: the kidney has two pyelocaliceal systems and is associated with a single ureter or with a bifid ureter (a partial duplication) or, in the case of a complete duplication, with 2 ureters (double ureters) that drain separately into the urinary bladder
  • bifid system: two pyelocaliceal systems join at the ureteropelvic junction (bifid pelvis), or 2 ureters join before draining into the urinary bladder (bifid ureters)
  • double ureters: two ureters open separately into the renal pelvis superiorly and drain separately into the bladder or genital tract
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