Anatomical variants · USMLE Step 1

A patient is found to have an arcuate uterus during evaluation for infertility. This variant is due to incomplete resorption of which embryologic structure?

  1. Uterovaginal canal
  2. Paramesonephric ducts
  3. Urogenital sinus
  4. Mesonephric ducts
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Correct answer: Paramesonephric ducts

An arcuate uterus results from partial failure of resorption of the paramesonephric duct septum. It is generally benign and has minimal impact on fertility.

Difficulty: Medium Question 4 of 20

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