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Related Experiment Videos

Type IV glycogen-storage disease. Light-microscopic, electron-microscopic, and enzymatic study.

G A Bannayan, W J Dean, R R Howell

    American Journal of Clinical Pathology
    |October 1, 1976
    PubMed
    Summary

    This report details a case of Type IV glycogen-storage disease in a 14-month-old girl. Diagnosis confirmed the absence of the branching enzyme crucial for glycogen metabolism.

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    Area of Science:

    • Biochemistry
    • Genetics
    • Pediatrics

    Background:

    • Glycogen storage diseases (GSDs) are a group of inherited metabolic disorders affecting glycogen synthesis or degradation.
    • Type IV glycogen-storage disease (Andersen disease) is a rare form characterized by deficiency of the glycogen branching enzyme.

    Observation:

    • A 14-month-old Latin American girl presented with clinical manifestations consistent with glycogen-storage disease.
    • Diagnostic evaluation included light and electron microscopy of affected tissues.

    Findings:

    • The patient was diagnosed with Type IV glycogen-storage disease.
    • Absence of the branching enzyme, alpha-1,4-glucan:alpha-1,4-glucan 6-glucosyl transferase, was confirmed in liver and cultured skin fibroblast samples.

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    Implications:

    • This case highlights the diagnostic criteria for Type IV glycogen-storage disease.
    • Understanding the enzymatic defect is crucial for potential therapeutic strategies and genetic counseling.