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MBBS QUESTION #10202
Question 1
A horseshoe kidney forms due to fusion of the lower poles of the developing kidneys anterior to the great vessels. Ascent of this fused kidney is typically arrested at the level of which structure?
  • The coeliac trunk
  • The inferior mesenteric artery✔️
  • The superior mesenteric artery
  • The renal veins alone, with no arterial involvement
Correct Answer Explanation
As the fused horseshoe kidney attempts to ascend from the pelvis, its isthmus becomes caught beneath the origin of the inferior mesenteric artery, arresting ascent at a lower-than-normal (usually L4-L5) vertebral level.