Anatomical variants · USMLE Step 1

Imaging reveals a duplicated ureter on the right side. This is due to duplication of which embryologic structure?

  1. Urogenital sinus
  2. Metanephric blastema
  3. Ureteric bud
  4. Mesonephric duct
Show answer and explanation

Correct answer: Ureteric bud

Duplicated ureters form from duplication of the ureteric bud. They may lead to ureteroceles or reflux depending on their insertion.

Difficulty: Medium Question 14 of 20

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