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Living with Distal trisomy 1p36

A rare chromosome condition with mild learning and developmental delays and early joining of skull bones.

Understanding Distal trisomy 1p36

Distal trisomy 1p36 is a rare condition caused by an extra piece of the short arm of chromosome 1.

People with this condition usually have borderline to mild intellectual disability and mild developmental delay. A key feature is metopic craniosynostosis, where a skull bone joins too early. Mild facial differences can occur. Other possible features are slow growth, a small head, large hands, joined fingers, extra ribs, and heart or bowel and anus differences. Signs show up in the newborn and infant years.

Signs & symptoms

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

  • Borderline to mild intellectual disability
  • Mild delays in development
  • Early joining of a skull bone (metopic craniosynostosis)
  • Slow growth
  • Small head size (microcephaly)
  • Heart 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
How should craniosynostosis be monitored or treated?
What heart tests does my child need?
Should my child's bowel and anus be checked?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in a person's genes cause this condition. The summary describes it as an extra copy of part of the short arm of chromosome 1.

Genetic

Also known as: distal duplication 1p36; distal trisomy 1p36 syndrome; distal trisomy type 1p36; telomeric duplication 1p36; trisomy 1pter

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Distal trisomy 1p36GARD ID 19303 · 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 trisomy 1p36.

Explore the Distal trisomy 1p36 blog

Explore research for Distal trisomy 1p36

Explore actively recruiting Distal trisomy 1p36 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Distal trisomy 1p36 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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