A Worm With a Rapid Wriggling Movement in the Right Colon
A 47-year-old man who had undergone a polypectomy 1 year previously underwent follow-up colonoscopy. While looking for polyps in the right colon, a small, white worm with a rapid wriggling movement was observed (see Figures 1 and 2).


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What is your diagnosis?

1. 
   This patient was diagnosed with Enterobius vermicularis infection (also known as "human pinworm," and previously as Oxyuris vermicularis infection).
   

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<p>This patient was diagnosed with <em>Enterobius vermicularis</em> infection (also known as "human pinworm," and previously as <em>Oxyuris vermicularis</em> infection).</p>