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Complete posterior acromioclavicular dislocation. A case report.

F A Barber

    Orthopedics
    |March 1, 1987
    PubMed
    Summary
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    A rare complete posterior acromioclavicular joint dislocation, where the clavicle pierces the trapezius muscle, was successfully treated. Early surgical repair led to full recovery, highlighting the need to assess for associated pulmonary injuries like pneumothorax.

    Area of Science:

    • Orthopedic Surgery
    • Trauma Care
    • Sports Medicine

    Background:

    • Acromioclavicular (AC) joint injuries are common, but severe posterior dislocations are exceptionally rare.
    • Complete posterior AC joint dislocation with distal clavicle entrapment by the trapezius muscle presents unique challenges.

    Observation:

    • A case of a complete posterior acromioclavicular joint dislocation with the distal clavicle penetrating and becoming entrapped within the trapezius muscle.
    • The patient presented with this rare injury pattern.

    Findings:

    • Early open reduction and surgical reconstruction of the periosteal-muscular envelope were performed.
    • Repair of the coracoclavicular ligaments was also conducted.
    • These interventions resulted in rapid and complete patient recovery.

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    Implications:

    • This case underscores the rarity of posterior AC joint dislocations with trapezius muscle entrapment.
    • Concurrent pulmonary complications, such as pneumothorax and pulmonary contusions, are possible and necessitate thorough evaluation.
    • Prompt surgical management is crucial for favorable outcomes in these complex injuries.