Abstract
A 57-year-old man was admitted to our hospital for lower abdominal pain. Colonoscopic examination revealed perforation of the sigmoid colon by a toothpick, which was successfully removed during colonoscopy. When peritonitis persists locally, colonoscopic removal could be one therapeutic option in cases of toothpick perforation. In addition, our experimental study indicates that the appearance of a toothpick in the body on CT images can be highly variable, which and that must be given sufficient consideration when we try to find a toothpick on CT images.