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Non-Majewski short rib-polydactyly syndrome

D O Sillence

    American Journal of Medical Genetics
    |January 1, 1980
    PubMed
    Summary

    Short rib-polydactyly (SRP) cases exhibit diverse clinical and radiographic findings. A specific chondrocyte change, PAS-positive inclusions, may not reliably distinguish SRP subtypes, requiring further research.

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    Area of Science:

    • Skeletal Dysplasias
    • Medical Genetics
    • Developmental Biology

    Background:

    • Non-Majewski short rib-polydactyly (SRP) encompasses a range of skeletal abnormalities.
    • Previous research suggested specific chondrocyte changes (PAS-positive inclusions) could differentiate SRP subtypes.

    Purpose of the Study:

    • To evaluate the diagnostic utility of PAS-positive inclusions in chondrocytes for classifying non-Majewski SRP cases.
    • To analyze the spectrum of clinical and radiographic findings in non-Majewski SRP.

    Main Methods:

    • Comparative analysis of clinical, radiographic, and morphologic data from multiple non-Majewski SRP cases.
    • Review of previously published findings and case studies.

    Main Results:

    • Clinical and radiographic findings in non-Majewski SRP present a wide spectrum of severity.
    • The presence of PAS-positive inclusions in chondrocytes was not consistently observed across cases with similar radiographic features, challenging their role as a definitive diagnostic marker.
    • Observed ossification defects varied, with Saldino-Noonan cases showing more severe long bone and pelvic defects.

    Conclusions:

    • The significance of PAS-positive inclusions in SRP requires further investigation through extensive morphologic studies.
    • Clinical and radiographic features alone are not pathognomonic for differentiating SRP subtypes.
    • Both genetic heterogeneity and variable gene expression are plausible explanations for the observed spectrum of findings in non-Majewski SRP.

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