Review Question - QID 218122

A 16-year-old ballet dancer comes to the clinic with a chief complaint of posterior ankle pain when in the "en pointe" position. She was diagnosed as having a symptomatic os trigonum two years prior, has tried non-operative management including anti-inflammatory use, activity modification, and physical therapy, and is now planning to undergo endoscopic resection. When counseling the patient and her mother, you discuss the possibility of permanent numbness after the procedure. Which of the following ankle arthroscopy portals depicted in Figure A places the sural nerve at the greatest risk?