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Related Experiment Videos

The pathogenesis of prune belly.

D K Nakayama, M R Harrison, D H Chinn

    American Journal of Diseases of Children (1960)
    |September 1, 1984
    PubMed
    Summary

    Prune belly syndrome, characterized by abdominal muscular laxity, may be a deformation caused by fetal abdominal distention. Early relief of this distention can potentially resolve the condition.

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    Area of Science:

    • Pediatric Surgery
    • Developmental Biology
    • Medical Genetics

    Background:

    • Prune belly syndrome is a congenital disorder characterized by abdominal muscle deficiency, urinary tract abnormalities, and undescended testes.
    • The etiology of prune belly syndrome has been debated, with theories ranging from intrinsic mesodermal defects to external compression factors.

    Observation:

    • Three neonates presented with severe abdominal muscular laxity due to distinct conditions: posterior urethral valves, nonimmune ascites, and intestinal duplication.
    • Two neonates had documented fetal abdominal distention caused by ascites via prenatal ultrasonography.
    • One fetus with urinary obstruction experienced in utero decompression at 21 weeks gestation, resulting in only mild abdominal changes postnatally.

    Findings:

    • The abdominal laxity observed in these cases appears to be a secondary deformation resulting from prolonged fetal abdominal distention.
    • The resolution of significant abdominal changes in a fetus after early in utero decompression suggests the "prune belly" phenotype is not irreversible.

    Implications:

    • These findings challenge the notion of an intrinsic generalized mesodermal abnormality as the sole cause of prune belly syndrome.
    • The results suggest that abdominal distention during fetal development is a critical factor, and early intervention may mitigate or resolve the characteristic phenotype.

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