During hip arthroscopy, establishment of the anterior portal places which of the following neural structures at the greatest risk of iatrogenic injury?

Explanation:
The anterior portal in hip arthroscopy is typically established slightly distal and lateral to the intersection of a sagittal line drawn distally from the anterior superior iliac spine (ASIS) and a transverse line across the superior margin of the greater trochanter. This portal penetrates the sartorius and rectus femoris interval, placing the lateral femoral cutaneous nerve (LFCN) and branches of the femoral nerve at significant risk. The LFCN is widely recognized as the most commonly injured nerve during hip arthroscopy. Reference: Campbell's Operative Orthopaedics, 14th Edition.