Ingestion of foreign bodies is frequent in the pediatric population, with coins being the most commonly ingested objects.

While a coin is mostly harmless, a battery could injure the patient. Thus, it is essential to identify the object correctly. These are very similar, but batteries usually have a slight step-off in profile and a double-ring or halo appearance when viewed across their diameter. Coins are plain and usually homogeneous.

Original cases are rID: 98824 (coin) and rID: 99637 (button battery).