Abstract
Anterior ankle snapping syndrome is rare. Snapping of the extensor digitorum longus due to attenuated inferior extensor retinaculum and snapping due to hypertrophied or low-lying peroneal tertius muscle have been reported. We reported a new mechanism of anterolateral snapping due to a hypertrophied talar head. Anterolateral snapping ankle can be revealed by active dorsiflexion and plantarflexion of the ankle with the foot inverted. Foot inversion will tension the inferior extensor retinaculum and uncover the dorsolateral prominence of the talar head. The dorsolateral prominence of the talar head will snap over the proximal edge of the inferior extensor retinaculum. This technical note reports the technique of arthroscopic contouring of the talar head via extra-articular ankle arthroscopy. We named this technique arthroscopic taloplasty.
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