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Living with Trisomy 1q

A rare chromosome condition with a partial extra copy of chromosome 1 that can affect learning, growth, and organs.

Understanding Trisomy 1q

Trisomy 1q is a rare chromosome condition in which part of the long arm (q) of chromosome 1 is duplicated.

It varies a lot between people. Main features are intellectual disability, short stature, differences in the face and head, heart defects, and urinary and genital differences. Brain and digestive differences, tremor with abnormal muscle tension, and repeated respiratory infections can also occur. It starts during pregnancy.

Signs & symptoms

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

  • Intellectual disability
  • Short stature
  • Differences in the face, such as a prominent forehead and low-set ears
  • Small lower jaw (micro-retrognathia)
  • Kidney differences (multicystic kidney dysplasia)
  • Enlarged brain fluid spaces (ventriculomegaly)

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

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn

It is caused by a partial duplication of the long arm of chromosome 1.

Genetic

Also known as: duplication 1q; trisomy 1q syndrome; trisomy type 1q

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Trisomy 1qGARD ID 20781 · 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 1q.

Explore the Trisomy 1q blog

Explore research for Trisomy 1q

Explore actively recruiting Trisomy 1q studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Trisomy 1q 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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