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Living with Ring chromosome 13

A rare chromosome change that can cause developmental delay, slow growth, a small head, and feet or palate differences.

Understanding Ring chromosome 13

Ring chromosome 13 is a rare chromosome change in which the ends of chromosome 13 join to form a ring.

Genes can be lost where the ends join, so severity depends on which genes are missing. Most people also have some cells with 46 normal chromosomes (mosaicism), which can lessen the effects. Features include developmental delay, slow growth, feeding and learning difficulties, a small head, and foot or palate differences. It usually is not inherited but can be.

Signs & symptoms

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

  • Severe intellectual disability in some people
  • Slow growth
  • Small head size (microcephaly)
  • Wide-set eyes and wide nasal bridge
  • Hypospadias or other genital differences
  • Low thyroid function (hypothyroidism)

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. Ask which tests can help

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

Care & treatment

Care team
Digestive system specialists (gastroenterologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
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 Chromosome Disorder Outreach
  • 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
Was this inherited, and should parents be tested?
Does mosaicism mean milder effects for my child?
What feeding and learning support is available?

Quick facts

Symptoms usually starta variety of ages

It usually happens by chance while egg or sperm cells form or soon after. In some cases it is inherited from a parent, and chromosome testing of parents can help.

GeneticGastrointestinal

Also known as: ring 13; ring chromosome 13 syndrome; ring chromosome type 13

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Ring chromosome 13GARD ID 6069 · 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 Ring chromosome 13.

Explore the Ring chromosome 13 blog

Explore research for Ring chromosome 13

Explore actively recruiting Ring chromosome 13 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Ring chromosome 13 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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