Deceiving duodenal erosion: fishbone lies beneath.

Incidental identification of foreign body (FB) during daily screening endoscopy is not rare. The patients may have unspecific symptoms and do not report a history of FB ingestion at presentation. Although these FBs mostly pass through the gastrointestinal tract uneventfully, a certain proportion could be impacted and cause complications. Lack of a definite history of FB ingestion could make diagnosis difficult and delay treatment when FB presents with deceiving endoscopic appearances. We report a duodenal FB mimicking erosion found in screening upper endoscopy.