The lateral collateral ligaments of the ankle are often damaged in ankle inversion injuries. Ankle inversion may also cause injury to other structures located around the ankle or further away, such as the common fibular nerve. Few descriptions exist of common fibular nerve injury associated with ankle sprains and chronic ankle instability. We describe the case of a patient who sustained common fibular nerve injury during each of two ankle sprain recurrences involving the lateral collateral ligaments. Our objectives are to illustrate the links between common fibular nerve and lateral collateral ligament injuries and to emphasize the importance of the neurological evaluation in patients seen for ankle sprains or chronic ankle instability.
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