Management of a Pseudoaneurysm After Carotid-Esophageal Fistula Repair Secondary to Button Battery Ingestion in an Infant.

Button battery ingestion is a significant cause of pediatric foreign body emergencies, often leading to severe complications. We present the case of an infant who developed a left common carotid-esophageal fistula after button battery ingestion, which was further complicated by the formation of a pseudoaneurysm. The diagnosis was confirmed through follow-up imaging, and the pseudoaneurysm was successfully treated using a flow diversion stent. The patient remained clinically stable without neurological deficits. This case underscores the critical importance of early diagnosis and intervention to prevent life-threatening complications such as hemorrhage and stroke. In addition, it highlights the necessity of follow-up imaging studies, even in asymptomatic patients, to monitor for delayed complications and inform ongoing management.