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Related Experiment Videos

Ulnar ray deficiency: its various manifestations.

A B Swanson, K Tada, K Yonenobu

    The Journal of Hand Surgery
    |September 1, 1984
    PubMed
    Summary

    This study classifies ulnar ray deficiency into four types based on ulna defects and associated limb anomalies. The classification aids in understanding the spectrum of congenital upper limb malformations.

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    Area of Science:

    • Orthopedics
    • Medical Genetics
    • Developmental Biology

    Background:

    • Ulnar ray deficiency is a spectrum of congenital upper limb malformations.
    • Understanding its clinical manifestations is crucial for diagnosis and management.

    Purpose of the Study:

    • To review clinical manifestations of ulnar ray deficiency.
    • To establish a subclassification system for ulnar ray deficiency.

    Main Methods:

    • Retrospective review of 88 upper extremities from 65 patients with ulnar ray deficiency.
    • Clinical assessment of limb anomalies.

    Main Results:

    • A four-type subclassification was established: Type I (partial ulna defect), Type II (total ulna defect), Type III (ulna defect with humeroradial synostosis), and Type IV (ulna defect with congenital amputation).
    • Associated anomalies included radial ray hypoplasia/defect, shoulder/humerus hypoplasia, elbow contractures/fusion, carpal bone fusion, syndactyly, and delta phalanx.

    Conclusions:

    • The proposed classification provides a framework for understanding the diverse clinical presentations of ulnar ray deficiency.
    • Ulnar ray deficiency is associated with a wide range of anomalies affecting other upper limb structures.

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