High Quality Content by WIKIPEDIA articles! Esophageal atresia (or Oesophageal atresia) is a congenital medical condition (birth defect) which affects the alimentary tract. It causes the esophagus to end in a blind-ended pouch rather than connecting normally to the stomach. It comprises a variety of congenital anatomic defects that are caused by an abnormal embryological development of the esophagus. Anatomically characterized by a congenital obstruction of the light of the esophagus with interrupted the continuity of the esophageal wall. The esophagus is divided into two blind pouches, an upper and lower, which may or may not communicate with the tracheobronchial tree through fistulous tracts called Tracheoesophageal Fistula (TEF).