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Living with Trisomy 8q

A rare chromosome condition with an extra piece of chromosome 8 that can affect development, the heart, and the face.

Understanding Trisomy 8q

Trisomy 8q is a rare chromosome condition in which there is an extra copy of genetic material on the long arm (q) of chromosome 8.

Symptoms and severity depend on the size and place of the duplication and whether other chromosome differences are present. Commonly reported features include developmental delay, learning difficulties, heart defects, bone differences, genital or urinary differences, and distinctive facial features. It is noticed at birth.

Signs & symptoms

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

  • Global developmental delay
  • Learning disability
  • Heart differences
  • Cleft palate or cleft lip
  • Small lower jaw (micrognathia)
  • Short neck and stiff joints

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 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
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
Would chromosome testing of both parents help?
What does the size of the duplication mean for my child?
Which specialists should check the heart and kidneys?

Quick facts

Symptoms usually startNewborn

It is caused by an extra piece of the long arm of chromosome 8. Most cases are not inherited. In some cases a parent has a chromosome rearrangement, such as a balanced translocation or inversion, that raises the risk.

Genetic

Also known as: duplication 8q; trisomy type 8q

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Trisomy 8qGARD ID 5362 · 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 Trisomy 8q.

Explore the Trisomy 8q blog

Explore research for Trisomy 8q

Explore actively recruiting Trisomy 8q studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Trisomy 8q 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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