[Mucosal impaction of a gastric foreign body (a coin)].

The follow up of a 4 1/2 years old boy ingesting a coin shows gastric stagnation of the foreign body. The coin does not pass through the pylorus and upper endoscopy is performed at 6 weeks. No foreign body is visualized but gastric retention is showed by X ray. The coin's extraction is performed after several "biopsy" because mucosal impaction. The patient is now no symptomatic. The anusual complication of coin's ingestion is reported to remember management of this problem.