A pin detected by ultrasonography within the normal appendix: prior to surgery, an impressive use of ultrasonography to localize an ingested foreign body exactly.

We present a 1-year-old boy who was asymptomatic and brought to the emergency room on suspicion of his having swallowed a pin. Confirmation of ingestion of the pin and its passage through the gut was achieved with abdominal radiography. The pin, which was followed with serial abdominal radiographs, was expected to leave the gastrointestinal tract, but was fixed to the right lower quadrant.