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Living with Thomas syndrome

A very rare genetic condition with kidney differences, heart differences, and cleft lip or palate.

Understanding Thomas syndrome

Thomas syndrome is a very rare genetic condition with kidney differences, heart differences, and cleft lip or palate.

GARD says it has been described in six people. It starts during pregnancy and is noticed at birth. Low levels of amniotic fluid during pregnancy are also listed.

Signs & symptoms

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

  • Absent or small kidney
  • Kidney with many cysts (multicystic dysplasia)
  • Cleft palate
  • Cleft upper lip
  • Underdeveloped left side of the heart
  • Wide-set eyes (hypertelorism)

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 ear, nose, and throat specialists, genetic specialists, heart and blood vessel specialists and kidney 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

    World Craniofacial Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Ear, nose, and throat specialists (otolaryngologists); Genetic specialists (geneticists); Heart and blood vessel specialists (cardiologists); Kidney specialists (nephrologists)
Expert care
Expert lists: World Craniofacial 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 World Craniofacial 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
Would genetic testing or counseling help our family?
Which specialists should be on our care team?
How are the kidney and heart differences followed over time?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Recessive

GARD says it may be autosomal recessive, which means a child would inherit a changed copy of a gene from each parent. It doesn't name a specific gene.

GeneticKidney

Also known as: potter sequence cleft lip and palate cardiopathy syndrome; potter sequence-cleft lip/palate-cardiopathy syndrome

Patient organizations

Source: NIH GARD · Thomas syndromeGARD ID 5175 · 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 Thomas syndrome.

Explore the Thomas syndrome blog

Explore research for Thomas syndrome

Explore actively recruiting Thomas syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Thomas syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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