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Living with 9q31.1q31.3 microdeletion syndrome

A rare genetic condition that can bring mild learning challenges, short height with higher weight, and a short neck.

Understanding 9q31.1q31.3 microdeletion syndrome

9q31.1q31.3 microdeletion syndrome is a rare genetic condition that includes mild intellectual disability.

It brings mild intellectual disability, short stature with a high body mass index, and a short neck. Distinct facial features are part of it. A metabolic syndrome, including type 2 diabetes, high cholesterol, and high blood pressure, has also been reported. GARD lists onset as newborn.

Signs & symptoms

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

  • Mild intellectual disability
  • Short stature
  • Overweight
  • Type 2 diabetes
  • High blood pressure
  • Short neck

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 brain and nervous 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
Brain and nervous system specialists (neurologists); 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
How often should blood sugar, cholesterol, and blood pressure be checked?
Should my heart valve be checked?
What diet and activity support is available?

Quick facts

Symptoms usually startNewborn

GARD says changes in genes (also called variants) cause this condition. The summary describes it as a missing piece (microdeletion) of chromosome 9.

GeneticNeurological

Also known as: del(9)(q31.1q31.3); monosomy 9q31.1q31.3

Patient organizations

Broader rare-disease groups

Source: NIH GARD · 9q31.1q31.3 microdeletion syndromeGARD ID 21705 · 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 9q31.1q31.3 microdeletion syndrome.

Explore the 9q31.1q31.3 microdeletion syndrome blog

Explore research for 9q31.1q31.3 microdeletion syndrome

Explore actively recruiting 9q31.1q31.3 microdeletion syndrome studies with HealthSpark.

HealthSpark

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  • 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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