Ring Chromosome 13: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Ring Chromosome 13?
A pediatrician or family doctor usually manages day-to-day care. Families often also see a medical geneticist. Depending on symptoms, a child may need a neurologist for seizures, a cardiologist for heart issues, or other specialists, with the primary care doctor coordinating this team.
What it is
Ring chromosome 13 is a rare genetic condition. It happens when chromosome 13 breaks at both ends and the ends join together to form a ring. This removes some genetic material, and the missing pieces cause the features of the condition. Doctors often write it as r(13).
Symptoms
Symptoms vary from person to person and depend on which genes are missing from the ring. Many children grow slowly and have intellectual disability, meaning they learn and develop more slowly than expected. Some have a small head size, called microcephaly.
Other features can include seizures. Some children have differences in the eyes, hands, feet, or genitals. Feeding problems in infancy and delayed speech are also common.
Causes and who gets it
Ring chromosome 13 usually happens by chance around the time a baby is conceived. In most cases, neither parent has it, and nothing they did caused it. Only a few hundred cases have been reported.
How doctors diagnose it
Doctors suspect this condition from symptoms such as slow growth, developmental delay, and seizures. The diagnosis is confirmed with a blood test called a karyotype, which looks at the chromosomes. Other tests can show which genes are missing.
Treatment
There is no cure, but treatment can help manage symptoms. Seizures are treated with medicines. Many children benefit from physical, occupational, and speech therapy, along with special education support. Regular checkups help doctors watch growth and development.
When to see a doctor
Talk to a doctor if a child has slow growth, delayed development, unusual facial features, or seizures. Seek care right away for a first seizure, or if seizures suddenly change or get worse.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid with a flat monthly fee instead of using insurance for visits; a concierge doctor works similarly but usually costs more. For a child with ring chromosome 13, this kind of doctor can handle routine checkups, growth monitoring, and common problems directly. When complex issues appear, the doctor would refer the child to the right specialist and help coordinate care.
Common questions
Can ring chromosome 13 be cured?
No, there is no cure, because the missing genetic material cannot be replaced. Treatment aims to manage symptoms and help each child reach their own potential. Outcomes differ from person to person.
Will my other children have it?
In most cases, ring chromosome 13 happens by chance and is very unlikely to happen again. In some families, a parent has a balanced chromosome change that raises the risk. Genetic testing and counseling can give a family a clearer answer.
How rare is ring chromosome 13?
It is very rare, with only a few hundred cases reported in the medical literature. Because it may be underdiagnosed, the true number of people affected is not known.
Can a child with ring chromosome 13 go to a regular school?
Many children attend school with extra support, such as special education services. The level of support needed depends on the child's development. An individualized education program can help. This is a written plan for a student's special learning needs.
Sources
- NIH Genetic and Rare Diseases Information Center - Ring chromosome 13
- National Organization for Rare Disorders (NORD) - ring chromosome 13 - National Organization for Rare Disorders
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
