Illustration of the anatomical forms of congenital esophageal atresia and congenital tracheoesophageal fistula. 1.total cordonal atresia 2.segmental atresia 3.segmental atresia with esophagotracheal fistula (s) a.cranial fistula b.caudal fistula c.cranial and caudal fistulas 4. esophagotracheal fistula without atresia, known as H-type fistula