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Living with Distal monosomy 14q

A rare chromosome condition that can affect development, muscle tone, the heart, and facial features from birth.

Understanding Distal monosomy 14q

Distal monosomy 14q is a rare condition caused by a missing piece of the long arm of chromosome 14.

The features depend on the size of the missing piece. They can include delays in overall development, low muscle tone, and heart defects present from birth. Facial features may be different, and some babies have a weak, high-pitched cry. Seizures and dental and eye differences have also been reported. Signs are present from the newborn period.

Signs & symptoms

GARD doesn't list common symptoms for this condition, but the summary describes these features:

  • Delays in overall development
  • Low muscle tone (hypotonia)
  • Heart defects present from birth
  • Seizures
  • Weak, high-pitched cry
  • Dental and eye differences

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 heart tests should my child have?
How should seizures be watched for and managed?
Which eye and dental specialists should be involved?

Quick facts

Symptoms usually startNewborn

GARD says changes in a person's genes cause this condition. The summary describes it as a loss of part of chromosome 14.

Genetic

Also known as: distal deletion 14q; distal monosomy 14q syndrome; distal monosomy type 14q; telomeric deletion 14q

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Distal monosomy 14qGARD ID 19329 · 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 Distal monosomy 14q.

Explore the Distal monosomy 14q blog

Explore research for Distal monosomy 14q

Explore actively recruiting Distal monosomy 14q studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Distal monosomy 14q 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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