Which duplication type results in two complete collecting systems and two ureters entering the bladder?

Which duplication type results in two complete collecting systems and two ureters entering the bladder?

• A. Complete duplication
• B. Incomplete duplication
• C. UPJ obstruction
• D. Horseshoe kidney

Answer: (A)

Complete duplication is when the kidney has two separate collecting systems, each with its own ureter that drains independently into the bladder. This happens when the duplicated ureteral buds develop and remain separate, so two ureters enter the bladder. Incomplete duplication would mean the two collecting systems fuse into a single ureter before reaching the bladder, yielding one ureteric entering point. UPJ obstruction and a horseshoe kidney are different anomalies and do not describe duplicated collecting systems. So, the pattern of two complete collecting systems with two ureters entering the bladder is characteristic of complete duplication.

Complete duplication is when the kidney has two separate collecting systems, each with its own ureter that drains independently into the bladder. This happens when the duplicated ureteral buds develop and remain separate, so two ureters enter the bladder. Incomplete duplication would mean the two collecting systems fuse into a single ureter before reaching the bladder, yielding one ureteric entering point. UPJ obstruction and a horseshoe kidney are different anomalies and do not describe duplicated collecting systems. So, the pattern of two complete collecting systems with two ureters entering the bladder is characteristic of complete duplication.