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Living with 6q terminal deletion syndrome

A rare chromosome condition that can bring developmental delay, distinct facial features, and brain differences.

Understanding 6q terminal deletion syndrome

6q terminal deletion syndrome is a rare condition caused by a missing piece at the end of the long arm of chromosome 6.

Features vary widely. They include distinct facial features, global developmental delay, and intellectual disability. Low muscle tone, seizures, retinal differences, and brain differences have been reported. GARD lists onset as the newborn and infant period.

Signs & symptoms

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

  • Global developmental delay
  • Delayed speech and language
  • Mild intellectual disability
  • Low muscle tone in infants
  • Crossed eyes (strabismus)
  • Brain differences (white matter, cortex)

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
Should my child have a brain MRI?
Should my child have a full eye exam?
What therapies can support walking and speech?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in genes (also called variants) cause this condition. The summary describes a partial deletion of the long arm of chromosome 6.

GeneticGastrointestinal

Patient organizations

Broader rare-disease groups

Source: NIH GARD · 6q terminal deletion syndromeGARD ID 18931 · 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 6q terminal deletion syndrome.

Explore the 6q terminal deletion syndrome blog

Explore research for 6q terminal deletion syndrome

Explore actively recruiting 6q terminal deletion syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for 6q terminal deletion 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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