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Brachymetacarpia and brachyphalangia.

T Miura, S Torii, R Nakamura

    The Journal of Hand Surgery
    |November 1, 1986
    PubMed
    Summary

    Congenital hand anomalies involving shortened bones are common. Analysis of 325 patients reveals complex variations in metacarpal and phalangeal shortening, often defying simple classification systems.

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    Area of Science:

    • Orthopedics
    • Radiology
    • Genetics

    Background:

    • Congenital hand anomalies present diverse skeletal malformations.
    • Shortening of metacarpals and phalanges are common findings.
    • Existing classifications may not encompass all observed variations.

    Purpose of the Study:

    • To analyze the radiographic features of congenital hand anomalies characterized by bone shortening.
    • To evaluate the prevalence and patterns of metacarpal and phalangeal shortening.
    • To assess the adequacy of current classifications for these anomalies.

    Main Methods:

    • Retrospective analysis of X-ray images from 325 patients with congenital hand anomalies.
    • Detailed examination of metacarpal and phalangeal lengths.
    • Comparison of findings with established classification systems.

    Main Results:

    • Most patients with syndactyly or cleft hand showed isolated shortening of the small finger's middle phalanx.
    • Shortening of the index finger's middle phalanx was also observed in some cases.
    • Brachymesophalangia of the second and fifth rays correlated with shortened index and small finger middle phalanges.
    • Complex combinations of shortened metacarpals and phalanges were frequent, challenging simple categorization.
    • Some anomalies did not fit existing classifications, like Bell's.

    Conclusions:

    • Congenital anomalies involving shortened metacarpals and phalanges exhibit significant variability.
    • Current classification systems may be insufficient to categorize the wide spectrum of these anomalies.
    • Further research is needed to develop more comprehensive classification approaches for these complex hand malformations.

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