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Incomplete carpal coalition.

C S Resnik, J D Grizzard, B P Simmons

    AJR. American Journal of Roentgenology
    |August 1, 1986
    PubMed
    Summary
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    Partial congenital coalition between the lunate and triquetrum bones can present with unique radiographic findings. This study identifies rounded radiolucencies as a key indicator of this wrist anomaly.

    Area of Science:

    • Orthopedics
    • Radiology
    • Developmental Biology

    Background:

    • Congenital coalition of carpal bones is a recognized skeletal anomaly.
    • The lunate-triquetrum coalition is a common type, often presenting with varied radiographic features.

    Purpose of the Study:

    • To describe the radiographic appearance of partial lunate-triquetrum coalition.
    • To propose a developmental etiology for observed radiographic findings.

    Main Methods:

    • Retrospective review of seven patients with partial lunate-triquetrum coalition.
    • Analysis of radiographic images, focusing on subarticular regions of the lunate and triquetrum.

    Main Results:

    • All seven patients exhibited partial coalition between the lunate and triquetrum.

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  • Distinctive rounded radiolucencies were noted in the subarticular regions of both bones.

    • Conclusions:

    • The combination of partial lunate-triquetrum coalition and subarticular radiolucencies suggests abnormal joint space development.
    • Misplaced synovial tissue remnants during development are the likely cause of these radiographic findings.