Atresia (ah-TREE-zhah) is a condition in which a baby is born with a missing or
closed valve or tube somewhere in his or her body.
Anal atresia (imperforate anus) is a defect of the digestive
tract in which the opening to the anus is missing or blocked.
More to Know
Air, blood, bodily fluids, and
waste products travel throughout the body in a system of vessels, tubes, and chambers
that are often separated by valves. When a child is born with atresia, it means that
a valve is missing or a tube is closed off. This interrupts the normal flow of blood,
fluid, waste, or air, which can lead to a number of complications.
Most kinds of atresia are serious and can be fatal if they go untreated. Treatment
usually involves surgery
while the child is still an infant.
Atresia can affect many body parts, including the nose, ears, organs, digestive
tract, and heart. The types of atresia are named for the body parts they affect: