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Living with Chromosome 14q11-q22 deletion syndrome

A rare condition from a missing piece of chromosome 14, with developmental delay, low muscle tone, and facial differences.

Understanding Chromosome 14q11-q22 deletion syndrome

Chromosome 14q11-q22 deletion syndrome (14q11.2 microdeletion syndrome) is a condition with developmental delay, low muscle tone, and facial differences.

GARD describes developmental delay, low muscle tone (hypotonia), and distinct facial features. It lists onset in the newborn period and infancy. Other listed features include mild intellectual disability and a hole in the wall between the heart's lower chambers.

Signs & symptoms

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

  • Mild intellectual disability
  • Broad forehead and deep-set eyes
  • Flat nasal bridge
  • Small lower jaw
  • High palate
  • Hole in the heart wall (ventricular septal 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

    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
Which genetic test confirmed the deletion?
Should the heart be checked?
What early therapies can support development and muscle tone?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in genes cause this condition. It describes a missing piece (deletion) of chromosome 14 at 14q11.2.

Genetic

Also known as: 14q11.2 microdeletion syndrome; chromosome 14q11-q22 deletion syndrome, isolated cases; del(14)(q11.2); monosomy 14q11.2

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Chromosome 14q11-q22 deletion syndromeGARD ID 17241 · 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 14q11-q22 deletion syndrome.

Explore the Chromosome 14q11-q22 deletion syndrome blog

Explore research for Chromosome 14q11-q22 deletion syndrome

Explore actively recruiting Chromosome 14q11-q22 deletion syndrome studies with HealthSpark.

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  • Eligibility is confirmed by the study team

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