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Review Question - QID 216551

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QID 216551 (Type "216551" in App Search)
Following ankle arthroscopy performed through a posterolateral portal, a patient notes numbness on the lateral half of the heel pad of the foot. What is the most likely injured structure?

Sural nerve

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Lateral plantar nerve

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Lateral calcaneal nerve

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First branch of the lateral plantar nerve

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Deep peroneal nerve

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The lateral calcaneal nerve is a branch of the sural nerve that runs along the lateral border of the Achilles tendon to innervate the lateral heel pad. Ankle arthroscopy involves posterior portals that hug the Achilles tendon to avoid the main trunks of the sural nerve and tibial nerve; however, the lateral calcaneal branch remains potentially vulnerable. The first branch of the lateral plantar nerve is actually a medial structure that partially innervates the plantar fascia and the abductor digiti quinti. The deep peroneal nerve is anterior to the ankle.

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