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Living with Cloacal exstrophy

A serious birth difference where the bladder and part of the intestine are outside the belly, often with spine and other differences.

Understanding Cloacal exstrophy

Cloacal exstrophy, also called OEIS complex, is the most severe birth defect in the exstrophy-epispadias complex.

OEIS stands for omphalocele, exstrophy, imperforate anus, and spinal defects. The bladder and part of the intestine are exposed outside the belly, and the pelvis is open like a book. Spina bifida occurs in up to 75% of cases, and kidney differences are common. It happens in the first trimester, apparently when a tissue called the cloacal membrane ruptures.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Bladder and intestine outside the belly
  • Anus not open (imperforate anus)
  • Omphalocele (belly wall defect near the navel)
  • Spina bifida and other spine differences
  • Kidney differences
  • Differences in the genitals

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include digestive system specialists, genetic specialists, kidney specialists and urinary and male reproductive system specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Fetal Health Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Digestive system specialists (gastroenterologists); Genetic specialists (geneticists); Kidney specialists (nephrologists); Urinary and male reproductive system specialists (urologists)
Expert care
Expert lists: Fetal Health Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Fetal Health Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What is the surgery plan, and who is on the specialist team?
How should the spine and kidneys be checked?
What is the long-term plan for bladder and bowel care?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says it occurs in the first trimester, apparently from rupture of the cloacal membrane, which leads to abnormal development of the belly wall and other structures.

GeneticKidneyGastrointestinalUrinary and Reproductive

Also known as: cloacal exstrophy (disease); exstrophy of cloaca; exstrophy of cloaca sequence; omphalocele-cloacal exstrophy-imperforate anus-spinal defect syndrome

Patient organizations

Source: NIH GARD · Cloacal exstrophyGARD ID 4080 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Cloacal exstrophy.

Explore the Cloacal exstrophy blog

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Explore actively recruiting Cloacal exstrophy studies with HealthSpark.

HealthSpark

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  • Recruiting studies from ClinicalTrials.gov
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