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An extra-structure with muscle echopattern located posterior-lateral to the peroneal tendons. It starts in the distal leg and ends at the retrotrochlear eminence of the calcaneum.
The anterior talofibular ligament shows laxity and mild thinning. The calcaneofibular ligament is thickened. Small effusion in the anterior ankle joint recess. Normal anterior inferior tibiofibular ligament.
A short-axis cine-loop runs from the proximal to the distal direction. Similar extra-structure is present on the asymptomatic side.