Abstract
An 82-year-old woman underwent medical examination after complaining of lower abdominal pain. Computed tomography revealed a foreign body perforating the sigmoid colon and abdominal free air. She was admitted to our hospital and the foreign body, which was subsequently shown to be a fish bone, was removed endoscopically. She was treated by conservative medication without complications. In the literature, perforation of the colon by foreign bodies has been treated surgically in many cases. However, there are also cases that can be treated endoscopically and conservatively.