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Living with Congenital secretory diarrhea, chloride type

A lifelong genetic condition with large watery stools high in chloride, starting before birth.

Understanding Congenital secretory diarrhea, chloride type

Congenital secretory diarrhea, chloride type (congenital chloride diarrhea) is a lifelong condition that causes large, watery stools with too much chloride.

Diarrhea begins even before birth. Ultrasound may show extra amniotic fluid and enlarged loops of intestine in the baby. Newborns are often premature and may have a swollen belly, so it can first be mistaken for an intestinal blockage. It can cause low blood sodium and chloride, dehydration, delayed growth and development, and kidney damage.

Signs & symptoms

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

  • Watery (secretory) diarrhea
  • Swollen belly (abdominal bloating)
  • Dehydration
  • Poor weight gain (failure to thrive)
  • Delayed growth
  • Premature birth

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 and genetic specialists.

  3. Consider genetic testing

    Changes in SLC26A3 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Association of Gastrointestinal Motility Disorders may keep lists of experts for this condition.

Care & treatment

Care team
Digestive system specialists (gastroenterologists); Genetic specialists (geneticists)
Expert care
Expert lists: Association of Gastrointestinal Motility Disorders
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 Association of Gastrointestinal Motility Disorders 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
Would SLC26A3 gene testing help our family?
How do we keep salt and fluid levels balanced at home?
How often should kidney health and growth be checked?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesSLC26A3

It is caused by changes in the SLC26A3 gene. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

GeneticGastrointestinal

Also known as: chloride diarrhea, congenital, finnish type; chloridorrhea, congenital; congenital chloride diarrhea; congenital chloride diarrhea finnish type; congenital chloride diarrhoea finnish type; congenital chloridorrhea

Patient organizations

Source: NIH GARD · Congenital secretory diarrhea, chloride typeGARD ID 10001 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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