The superior peroneal retinaculum connects the lateral malleolus to the lateral calcaneus, forming the roof of the retromalleolar peroneal groove and constraining the peroneal tendons behind the fibula.
Constrains the peroneal tendons within the retromalleolar groove and is the primary restraint against peroneal tendon subluxation anterior to the fibula.
SPR disruption from inversion injury or direct trauma allows peroneal tendon subluxation, producing a snap on dorsiflexion. Surgical repair or groove deepening with retinaculum repair restores tendon constraint.
SPR disruption allowing peroneal tendons to subluxate anterior to the fibula, managed by retinaculum repair and groove deepening for recurrent subluxation.
Acute SPR avulsion from fibular periosteum with immediate tendon dislocation, repaired acutely by periosteal reattachment.
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