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Carpometacarpal dislocations.

M R Fisher, L F Rogers, R W Hendrix

    Critical Reviews in Diagnostic Imaging
    |January 1, 1984
    PubMed
    Summary
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    Carpometacarpal joint dislocations are rare and often missed on X-rays. This study details diagnostic criteria and a systematic approach to improve recognition of these hand injuries.

    Area of Science:

    • Orthopedic Surgery
    • Radiology
    • Anatomy

    Background:

    • Carpometacarpal (CMC) joint dislocations are uncommon injuries.
    • Subtle radiographic findings can lead to missed diagnoses.
    • Accurate diagnosis requires understanding normal CMC joint anatomy.

    Purpose of the Study:

    • To elucidate the mechanism of CMC joint dislocations.
    • To develop and present diagnostic criteria for CMC dislocations.
    • To improve the recognition of CMC joint injuries.

    Main Methods:

    • Anatomical dissections of the hand were performed.
    • Diagnostic criteria were developed based on dissections and literature review.
    • A series of CMC dislocations were reviewed using the developed criteria.

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    Main Results:

    • The study presents the incidence and diagnostic characteristics of CMC dislocations.
    • A systematic approach for radiographic evaluation is detailed.
    • Key radiographic indicators include parallelism, symmetry, overlapping articular surfaces, and a distinct cortical rim on posteroanterior views.

    Conclusions:

    • Understanding normal CMC joint anatomy is crucial for diagnosing dislocations.
    • The proposed systematic radiographic approach aids in identifying subtle CMC dislocations.
    • Improved diagnostic accuracy can lead to timely and appropriate treatment of CMC joint injuries.