Duodenal Atresia is a congenital condition characterised by underdevelopment of duodenum. It is the most common type of congenital small bowel obstruction with an incidence of approximately 1 in 10,000 live births. The clinical presentation depends on the degree of atresia that is present. A classic sign is bilious vomiting without abdominal distention. Weight loss, dehydration and hypochloremic metabolic acidosis are common.
In most cases, the etiology of duodenal atresia is unknown. It is mostly sporadic but autosomal recessive pattern has been noted in some families.