Short answer · Medically reviewed summary · Last updated: 2026-05-08
1p36 Deletion Syndrome is a rare genetic condition caused by the loss of a specific segment of genetic material on the short arm of chromosome 1, typically diagnosed through specialized chromosomal microarray testing. If you suspect 1p36 Deletion Syndrome, it is important to consult a geneticist, as symptoms often present in early childhood and include developmental delays, intellectual disability, and distinct facial features. What are the common signs of 1p36 Deletion Syndrome? Because 1p36 Deletion Syndrome is a multisystem disorder, symptoms vary widely among individuals.
How do I know if I have 1p36 Deletion Syndrome?
Could you have 1p36 Deletion Syndrome? Early signs that prompted real patients to seek diagnosis, plus medically reviewed guidance.
1p36 Deletion Syndrome is a rare genetic condition caused by the loss of a specific segment of genetic material on the short arm of chromosome 1, typically diagnosed through specialized chromosomal microarray testing. If you suspect 1p36 Deletion Syndrome, it is important to consult a geneticist, as symptoms often present in early childhood and include developmental delays, intellectual disability, and distinct facial features.
What are the common signs of 1p36 Deletion Syndrome?
Because 1p36 Deletion Syndrome is a multisystem disorder, symptoms vary widely among individuals. Clinicians often look for a pattern of features rather than a single symptom. Common indicators include:
- Significant developmental delays and intellectual disability.
- Distinctive craniofacial features, such as deep-set eyes, a pointed chin, or midface hypoplasia.
- Congenital heart defects, which occur in approximately 70% of individuals with 1p36 Deletion Syndrome.
- Seizures or epilepsy reported in roughly 50% of cases.
- Feeding difficulties and low muscle tone (hypotonia) during infancy.
How is 1p36 Deletion Syndrome diagnosed?
If you or a family member exhibit these signs, the gold-standard diagnostic tool is a chromosomal microarray (CMA). Standard karyotyping may miss smaller deletions, so ensure your physician orders a microarray to specifically look for the 1p36 deletion. If you are concerned about your own health or that of a child, ask your primary care provider for a referral to a clinical geneticist who specializes in rare chromosomal disorders.
When should I seek urgent medical evaluation?
While 1p36 Deletion Syndrome is typically diagnosed in childhood, certain red flags require immediate attention. Seek urgent care if there is evidence of unexplained seizures, sudden cardiac distress (such as fainting or irregular heartbeat), or severe respiratory issues related to hypotonia. If you feel your concerns are being dismissed, bring a summary of documented developmental milestones and a list of specific physical symptoms to your appointment to facilitate a more focused clinical discussion.
Next steps
- Schedule an appointment with a board-certified clinical geneticist.
- Request a chromosomal microarray test to investigate your concerns regarding 1p36 Deletion Syndrome.
- Connect with the DiseaseMaps.org community to learn from the 22 members currently sharing their experiences with 1p36 Deletion Syndrome.
- Keep a detailed diary of developmental milestones and medical events to share with your specialist.
Medical disclaimer: This information is for educational purposes only and does not constitute medical advice; please consult a healthcare professional for diagnosis and treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): 1p36 deletion syndrome
- Orphanet: 1p36 deletion syndrome (ORPHA:1679)
- Online Mendelian Inheritance in Man (OMIM): Chromosome 1p36 Deletion Syndrome (#607872)
- 1p36 Deletion Support & Awareness (1p36dsa.org)
