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Ectopic Enterobius vermicularis

G S McDonald, D O Hourihane

    Gut
    |August 1, 1972
    PubMed

    Insights

    Pinworms (Enterobius vermicularis) typically infect the intestine but can invade surrounding tissues. This rare occurrence in diseased gastrointestinal walls can mimic serious conditions like cancer.

    Area of Science:

    • Gastroenterology
    • Parasitology
    • Pathology

    Background:

    • Enterobius vermicularis, the pinworm, is a common intestinal parasite.
    • Extraintestinal migration of pinworms is rare but can occur.
    • Previous literature on pinworm complications is limited.

    Purpose of the Study:

    • To report rare cases of Enterobius vermicularis found outside the gastrointestinal lumen.
    • To describe the pathological findings and clinical presentations associated with these ectopic infections.
    • To review existing literature on pinworm tissue migration.

    Main Methods:

    • Case series of three patients with ectopic pinworm infections.
    • Histopathological examination of tissue samples.
    • Clinical data review and literature search.

    Main Results:

    • Enterobius vermicularis identified in the colon wall, retrocaecal tissues, and peritoneum.
    • Ectopic pinworm presence associated with significant inflammatory reactions.
    • Lesions mimicked clinical and pathological features of carcinoma and Crohn's disease.

    Conclusions:

    • Enterobius vermicularis penetration of the gastrointestinal tract requires pre-existing disease.
    • Ectopic pinworms can induce inflammatory responses and mimic other serious abdominal pathologies.
    • Perforation by ectopic pinworms can lead to generalized peritonitis.

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