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Posterior acromioclavicular dislocation

P Søndergård-Petersen, P Mikkelsen

    The Journal of Bone and Joint Surgery. British Volume
    |January 1, 1982
    PubMed
    Summary

    Posterior acromioclavicular joint dislocation, a rare injury, involves the clavicle locking behind the acromion. Early reduction is recommended, though clavicle resection can yield good results.

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    Area of Science:

    • Orthopedic Surgery
    • Traumatology
    • Radiology

    Background:

    • Posterior dislocation of the acromioclavicular (AC) joint is exceptionally rare.
    • This injury involves the lateral clavicle becoming displaced posteriorly and locked behind the acromion.

    Observation:

    • A case is presented of a patient with posterior AC joint dislocation diagnosed two weeks after a shoulder injury.
    • The patient experienced significant pain and restricted shoulder movement due to the locked clavicle.
    • Radiographs revealed a high-riding clavicle on AP views, with the axial view confirming the posterior dislocation.

    Findings:

    • Intraoperative findings included overstretched but intact coracoclavicular ligaments.
    • Closed or open reduction of the AC joint was not feasible.
    • Resection of the lateral clavicle was performed, resulting in a perfect outcome.

    Implications:

    • This case highlights the diagnostic challenges of posterior AC joint dislocations.
    • Early closed or open reduction is considered the optimal treatment strategy.
    • Clavicle resection serves as a viable alternative when reduction is not possible.

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