Retrograde esophagoscopy for foreign body removal.

Foreign bodies of the esophagus may penetrate the wall and migrate extraluminally, requiring a thoracotomy for removal. We report two children who swallowed coins that went undetected for several months and slowly eroded into the esophageal wall. These coins could not be retrieved by upper endoscopy, because of proximal strictures and granulation tissue at the perforation sites. Following surgical gastrostomy and retrograde flexible endoscopy, the coins were successfully removed. Retrograde endoscopy should be considered for removal of foreign esophageal objects before undertaking a thoracotomy.