Duodenal atresia is an embryopathy of the cranial intestine that leads to a complete absence of the duodenal lumen. The disease is duodenal atresia (Monarch Disease Ontology entry MONDO_0009126). Also known as: Duodenal Atresia or Stenosis, atresia of duodenum, congenital atresia of duodenum, congenital duodenal atresia, duodenal atresia (disease).