Which of the following structures passes through the lesser sciatic foramen?

• A Sciatic nerve
• B Pudendal nerve ✓
• C Superior gluteal vessels
• D Posterior femoral cutaneous nerve

Explanation

The pudendal nerve and internal pudendal vessels leave the pelvis through the greater sciatic foramen below piriformis, hook around the sacrospinous ligament, and re-enter the pelvis through the lesser sciatic foramen to reach the pudendal canal in the lateral wall of the ischiorectal fossa. The sciatic nerve, posterior femoral cutaneous nerve and both gluteal vessel sets pass only through the greater sciatic foramen and never traverse the lesser foramen, making option B the sole correct choice.

Reference: Gray's Anatomy for Students, 4th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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