Abstract
Ankle fractures and fracture dislocations are common injuries in orthopaedic practice however pure ankle dislocation without an associated fracture is extremely rare. There are a few cases reporting such a lesion in the literature. Also this injuries are generally open high energy trauma injuries. Closed treatments are reported to be effective and ligament injuries are generally not reported. In this study, we report a closed pure posteromedial ankle dislocation with anterior talofibular ligament rupture and its treatment and outcome in a 12 year-old boy. We think that this is an extremely rare lesion.
Highlights
Pure dislocation of the posterior border of the tibia is an extremely rare injury [1-5]
The rarity is due to mechanical efficacy of the ankle mortise and resistance of the ankle ligaments being greater than bone making fracture common [6]
We present one of these rare injuries; a closed true posteromedial dislocation of the ankle without associated fracture of the ankle region in a 12 year-old boy and its treatment with closed reduction and below-knee casting
Summary
Pure dislocation (dislocation without associated fractures) of the posterior border of the tibia is an extremely rare injury [1-5]. Open injuries are reported to be more frequent only a few patients with posterior dislocation and entrapment of the entire distal part of the fibula behind the tibia without associated fracture has been reported in the pediatric age group [18]. In this case report, we present one of these rare injuries; a closed true posteromedial dislocation of the ankle without associated fracture of the ankle region in a 12 year-old boy and its treatment with closed reduction and below-knee casting. He was advised to begin physical therapy and progressively apply weight over the few weeks, and was cleared to return to activity seven weeks post-injury
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