Skip to content
knowrare
HealthSignal
Your condition community

Living with Chromosome 16 trisomy

A rare chromosome condition in which a person has three copies of chromosome 16 instead of two.

Understanding Chromosome 16 trisomy

Chromosome 16 trisomy is a rare chromosome condition in which cells have three copies of chromosome 16 instead of the usual two.

This means there is extra genetic material from chromosome 16 in the body. GARD says symptoms vary and are very difficult to predict. Some babies are born smaller than normal and can have a heart defect.

Signs & symptoms

Symptoms vary and are hard to predict. GARD says some babies have:

  • Smaller size at birth
  • Heart defect

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

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

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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
Which genetic test confirmed the diagnosis?
Does my baby need a heart check?
What does genetic counseling say about future pregnancies?

Quick facts

GARD says it occurs when a person has three copies of chromosome 16 instead of two.

Patient organizations

Source: NIH GARD · Chromosome 16 trisomyGARD ID 7060 · 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 Chromosome 16 trisomy.

Explore the Chromosome 16 trisomy blog

Explore research for Chromosome 16 trisomy

Explore actively recruiting Chromosome 16 trisomy studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Chromosome 16 trisomy 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

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Chromosome 16 trisomy studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

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

Get Signals for Chromosome 16 trisomy

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Chromosome 16 trisomy

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Chromosome 16 trisomy experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.