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Living with 11q22.2q22.3 microdeletion syndrome

A rare chromosome condition that can bring mild learning challenges, developmental delay, short height, and low muscle tone.

Understanding 11q22.2q22.3 microdeletion syndrome

11q22.2q22.3 microdeletion syndrome is a rare chromosome condition caused by a missing piece of chromosome 11.

People with this condition may have mild intellectual disability, developmental delay, short stature, and low muscle tone (hypotonia). They may also have distinct facial features. Anxiety and a short attention span 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
  • Low muscle tone (hypotonia)
  • Anxiety

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
What therapies can help with low muscle tone and development?
Can anxiety support be part of my child's care plan?
What does genetic testing show about this deletion?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in genes (also called variants) cause this condition. The summary describes it as a chromosome change.

GeneticNeurological

Also known as: 11q22.2-q22.3 deletion syndrome; del(11)(q22.2q22.3); monosomy 11q22.2-q22.3; monosomy 11q22.2q22.3

Patient organizations

Broader rare-disease groups

Source: NIH GARD · 11q22.2q22.3 microdeletion syndromeGARD ID 21858 · 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 11q22.2q22.3 microdeletion syndrome.

Explore the 11q22.2q22.3 microdeletion syndrome blog

Explore research for 11q22.2q22.3 microdeletion syndrome

Explore actively recruiting 11q22.2q22.3 microdeletion syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for 11q22.2q22.3 microdeletion 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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