Duodenal atresia is a condition in which the first part of the small bowel (the duodenum) has not developed properly. It is not open and cannot allow the passage of stomach contents.
The cause of duodenal atresia is unknown. It is thought to result from problems during an embryo's development, in which the duodenum does not change from a solid to a tube-like structure, as it normally would.
Many infants with duodenal atresia also have Down syndrome. Duodenal atresia is often associated with other birth defects.
Symptoms of duodenal atresia include:
A fetal ultrasound may show excessive amounts of amniotic fluid in the womb (polyhydramnios). It may also show swelling of the baby's stomach and part of the duodenum.
An abdominal x-ray may show air in the stomach and first part of duodenum, with no air beyond that. This is known as the double-bubble sign.
A tube is placed to decompress the stomach. Dehydration and electrolyte imbalances are corrected by providing fluids through an intravenous tube (IV, into a vein). Checking for other congenital anomalies should be done.
Surgery to correct the duodenal blockage is necessary, but not an emergency. The exact surgery will depend on the nature of the abnormality. Other problems (such as those related to Down syndrome) must be treated as appropriate.
Recovery from the duodenal atresia is expected after treatment. Untreated, the condition is deadly.
These complications may occur:
After surgery, there may be complications such as:
Call your health care provider if your newborn is:
There is no known prevention.
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.