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Related Experiment Videos

Intestinal ascariasis: new plain film features.

B A Ellman, J M Wynne, A Freeman

    AJR. American Journal of Roentgenology
    |July 1, 1980
    PubMed
    Summary

    Radiographs can reveal Ascaris worm bolus in children with intestinal obstruction. Recognizing these worm signs in asymptomatic cases is crucial to prevent nutritional deficiency from malabsorption.

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    Area of Science:

    • Radiology
    • Pediatric Gastroenterology
    • Parasitology

    Background:

    • Intestinal obstruction in children can be caused by Ascaris lumbricoides worm bolus.
    • Radiographic findings are crucial for diagnosing intestinal obstruction.
    • Ascariasis can lead to malabsorption and nutritional deficiencies, even in asymptomatic cases.

    Purpose of the Study:

    • To analyze radiographic features of Ascaris worm bolus in children with intestinal obstruction.
    • To evaluate the diagnostic accuracy of these features in identifying ascariasis.
    • To highlight the importance of recognizing ascariasis in asymptomatic children.

    Main Methods:

    • Retrospective analysis of radiographs from 30 children with confirmed Ascaris worm bolus obstruction.
    • Radiographic features such as worm outlines, gas patterns, and fluid level distortions were documented.
    • Comparison with radiographs of 68 children without bolus obstruction, including those with and without proven ascariasis.

    Main Results:

    • Worm bolus appeared as outlined worms against intestinal gas with irregular interfaces.
    • Gas within the bolus showed irregular outlines; fine linear radiolucencies and small bubbles were observed.
    • Characteristic "hump effect" due to distorted fluid levels was noted.
    • Suggestive radiographic features were present in 64% (28/44) of children with proven ascariasis.
    • False-positive diagnoses occurred due to confusion with fecal shadows in 4/24 children without ascariasis.

    Conclusions:

    • Specific radiographic features can suggest Ascaris worm bolus obstruction in children.
    • Radiographic identification of ascariasis is important, even in asymptomatic patients, due to potential malabsorption.
    • Radiologists should be aware of these findings to avoid misdiagnosis and ensure timely management.

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