Lateral peritalar dislocation

Case contributed by Dr Tim Luijkx

Presentation

Sprained ankle when dismounting bike.

Patient Data

Age: 55 years
Gender: Female

Initial X-ray

Modality: X-ray

Normal tibiotalar joint and ankle mortise. 

Lateral dislocation of calcaneus, midfoot and forefoot relative to the talus. 

Bone fragment originating from lateral malleolus dislocated dorsolaterally.

CT after closed reduction

Modality: CT

Normal alignment of sub-talar and talonavicular joint after closed reduction. 

Bone fragment of lateral malleolus in almost anatomical position. 

Case Discussion

Peritalar dislocation encompasses a combination of sub-talar and talonavicular dislocation. This dislocation is extremely rare, but can have major complications including avascular necrosis and osteoarthritis of the involved joints.

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Case Information

rID: 51903
Case created: 12th Mar 2017
Last edited: 31st Mar 2017
Inclusion in quiz mode: Included

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