An<unk>  is a rarely-occurring abnormal<unk>  connection between the aorta and the esophagus. It may be caused by a problem in the aorta or in the esophagus, and must be repaired with surgery to avoid hemorrhage. Common causes include surgery on the aorta in adults, and ingestion of a button battery in children.
Aortoesophageal fistula
Tracheoesophageal fistula
Tracheoinnominate fistula
Esophageal stricture
Esophageal rupture
Subglottic stenosis
Laryngotracheal stenosis
Esophageal web