Trough lesion after posterior shoulder dislocation
Posterior shoulder dislocation in a motorcycle accident 2 weeks earlier. Normal x-rays.
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Small osteochondral impression fracture at the antero-supero-medial aspect of the humeral head. There is also haemorhage in the posterior joint capsule, a postero-inferior labroligamentous lesion, and a bone buise in the scapular spine, probably resulting from the impact of the humeral head.
Typical injury pattern observed after a posterior glenohumeral dislocation.