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Fetal pseudoascites.

S J Rosenthal, R A Filly, P W Callen

    Radiology
    |April 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    A sonolucent band, termed pseudoascites, is a common finding in fetal ultrasounds, potentially mimicking ascites. This common artifact is not linked to fetal development or sonogram specifics.

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    Area of Science:

    • Obstetrics and Gynecology
    • Medical Imaging
    • Fetal Medicine

    Background:

    • Ascites in fetuses can indicate serious underlying conditions.
    • Accurate differentiation between true ascites and artifacts is crucial for diagnosis.
    • Sonolucent findings beneath the fetal abdominal wall require careful evaluation.

    Purpose of the Study:

    • To identify and characterize a sonolucent band observed in fetal abdominal sonograms.
    • To determine the prevalence and potential diagnostic implications of this finding.
    • To differentiate this sonolucent band from actual fetal ascites.

    Main Methods:

    • Retrospective analysis of 141 normal obstetrical sonograms.
    • Identification and measurement of a sonolucent band beneath the fetal abdominal wall.

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  • Correlation of the band's presence and width with gestational age, fetal position, and placental location.

    • Main Results:

    • A sonolucent band (pseudoascites) was identified in 39.7% of normal fetal sonograms.
    • In 12.6% of cases, the band was wide enough to be mistaken for true ascites.
    • Pseudoascites prevalence was independent of fetal age, position, placental location, or equipment.

    Conclusions:

    • Pseudoascites is a common sonographic finding in normal fetuses.
    • This artifact can be mistaken for fetal ascites, highlighting the need for careful interpretation.
    • The etiology of pseudoascites remains undetermined and it is not consistently present on serial scans.