Overview
Ring chromosome syndrome is a rare genetic condition that occurs when a chromosome breaks at both ends and the broken ends rejoin to form a circular or ring shape. This can happen with any of the 46 chromosomes in the human body. When a ring chromosome forms, small pieces of genetic material from the tips of the chromosome are usually lost, which can lead to a variety of health problems depending on which chromosome is affected and how much genetic material is missing. The symptoms of ring chromosome syndrome vary widely from person to person. Common features include growth delays, intellectual disability or learning difficulties, and distinctive facial features. Some individuals may have only mild symptoms, while others can be more severely affected. The severity often depends on how much genetic material was lost when the ring formed and whether the ring chromosome is unstable, meaning it can be lost or duplicated in some cells of the body (a situation called mosaicism). There is currently no cure for ring chromosome syndrome. Treatment focuses on managing the specific symptoms each person experiences. This may include growth hormone therapy for short stature, special education support for learning difficulties, physical therapy, speech therapy, and regular monitoring by various specialists. Early intervention and supportive care can significantly improve quality of life for affected individuals.
Key symptoms:
Short stature or growth delaysIntellectual disability or learning difficultiesDelayed speech and language developmentDelayed motor milestones like sitting or walkingDistinctive facial featuresSmall head size (microcephaly)Low muscle toneSeizures or epilepsyBehavioral challengesFeeding difficulties in infancySkin changes such as café-au-lait spotsHeart defects in some casesSkeletal abnormalitiesDelayed puberty or hormonal issuesVision or hearing problems
Sporadic
Usually appears on its own, not inherited from a parent
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Ring chromosome syndrome.
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Rare Disease Specialist
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Ring chromosome syndrome.
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Caregiver Resources
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Mental Health Support
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Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.Which chromosome is affected, and how much genetic material has been lost?,Is the ring chromosome stable, or is there mosaicism that could change over time?,What specific health screenings should my child have and how often?,What early intervention therapies do you recommend starting right away?,Are there any clinical trials or research studies we should know about?,What is the expected developmental outlook for my child based on their specific findings?,Should other family members be tested to see if this was inherited?
Common questions about Ring chromosome syndrome
What is Ring chromosome syndrome?
Ring chromosome syndrome is a rare genetic condition that occurs when a chromosome breaks at both ends and the broken ends rejoin to form a circular or ring shape. This can happen with any of the 46 chromosomes in the human body. When a ring chromosome forms, small pieces of genetic material from the tips of the chromosome are usually lost, which can lead to a variety of health problems depending on which chromosome is affected and how much genetic material is missing. The symptoms of ring chromosome syndrome vary widely from person to person. Common features include growth delays, intellectu
How is Ring chromosome syndrome inherited?
Ring chromosome syndrome follows a sporadic inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Ring chromosome syndrome typically begin?
Typical onset of Ring chromosome syndrome is neonatal. Age of onset can vary across affected individuals.
Which specialists treat Ring chromosome syndrome?
2 specialists and care centers treating Ring chromosome syndrome are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.