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General Surgery · Urology: varicocele
Sample itemA 20-year-old has a left scrotal swelling described as a bag of worms that increases on standing and reduces on lying down. Why is it more common on the left?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. The left testicular vein drains into the left renal vein at a right angle
The left testicular vein enters the left renal vein at a right angle and is longer, so pressure transmission favours reflux, whereas the right drains directly into the inferior vena cava. A sudden right-sided or non-reducing varicocele suggests a retroperitoneal or renal mass. Repair is for pain, infertility or adolescent testicular hypotrophy.
Option by option
A. The left testicular vein drains into the left renal vein at a right angle (correct)
Correct. Venous anatomy explains the left-sided predominance.
B. The left testis is larger
Testicular size is not the reason.
C. The right testicular vein drains into the portal vein
The right testicular vein drains into the IVC.
D. The left testicular artery is longer
Arterial length is not relevant.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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