Cloacal exstrophy is a birth defect that affects the urinary, digestive and reproductive systems. It causes an inside-out bladder (exstrophy) and organs that push through a hole in the abdomen (omphalocele). A child with cloacal exstrophy also has divided genitals and an incomplete anus. Infants need staged corrective surgeries to treat each of these problems.
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Cloacal exstrophy affects the formation of the lower abdominal wall of the developing fetus. Because the wall doesn’t form properly, the baby’s bladder and part of the large intestines (colon) are enclosed in a membrane on the outside of the body after birth. The condition also affects a child’s genitals.
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Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy
Cloacal exstrophy is a type of birth defect or congenital urinary anomaly. This means the condition occurs while a baby is developing in the womb and is present at birth. After a series of corrective surgeries that begin shortly after birth, most children with cloacal exstrophy do well and lead full lives.
Cloacal exstrophy is also known as OEIS complex or OEIS syndrome because it causes these problems:
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Cloacal exstrophy also affects a child’s genitals.
Cloacal exstrophy is rare, occurring in approximately 1 in 250,000 to 400,000 births. Male babies are two to three times more likely to have this condition.
Cloacal exstrophy is one condition in a group of birth defects called exstrophy-epispadias complex (EEC). It is the most severe type. A baby may have one condition or several.
Other EEC conditions include:
Healthcare providers don’t know why some babies develop this condition. Something happens during the first trimester of pregnancy that causes a tissue known as the cloacal membrane to tear or rupture.
The cloaca (clo-AY-ka) is the area where the reproductive, digestive and urinary systems come together. The cloacal membrane typically separates the organs in these systems. When there’s a rupture, the abdominal wall doesn’t form completely. Organs don’t develop as they should or may connect incorrectly. Some organs poke through an abdominal opening.
The signs of cloacal exstrophy are evident at birth. Your baby may have:
A prenatal ultrasound often detects cloacal exstrophy during pregnancy. You may also get a fetal MRI, which provides more detailed images of fetal organs. These tests may reveal:
After birth, your baby may get an MRI, abdominal ultrasound or other imaging scans to assess organ function and disease severity. This information helps your provider develop the best treatment plan for your child.
All newborns with cloacal exstrophy need surgery to put their organs into their proper place and close abdominal and spinal openings. Your child will need a series of surgeries over many years. This is known as staged reconstruction.
Treatments soon after birth may include:
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Treatments during early childhood may include:
After surgical treatments, most children with cloacal exstrophy live active, full lives. Some children will need additional surgeries as they mature.
Cloacal exstrophy increases the risk of:
You may want to ask your child’s healthcare provider:
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A note from Cleveland Clinic
Learning that your child has cloacal exstrophy, or OEIS syndrome, can make you feel scared and worried for your child's future. Your healthcare team will help plan several surgeries for your child soon after birth, with additional corrective surgeries to reconstruct organs will take place later on. With appropriate treatment, most children born with cloacal exstrophy enjoy full lives. Talk to your healthcare provider about any concerns you have.
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Last reviewed on 05/11/2022.
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