Overview
Angioosteohypotrophic syndrome is a very rare condition that affects blood vessels and bone development together. The name comes from three key features: 'angio' (blood vessels), 'osteo' (bone), and 'hypotrophic' (underdeveloped or smaller than normal). This syndrome causes abnormal blood vessel growth alongside poor or reduced bone development, typically affecting one limb or a specific part of the body more than others. The affected limb may be shorter, thinner, or weaker than the other side, and the skin and soft tissues in that area may also look different due to the abnormal blood vessel patterns. People with this syndrome may notice visible differences in the size or shape of an affected arm or leg from early childhood. The blood vessel abnormalities can sometimes cause skin discoloration, swelling, or pain. Because this condition is so rare, it is not always recognized quickly, and patients may see several specialists before getting a clear diagnosis. Treatment focuses on managing symptoms, supporting bone health, and addressing any complications from the abnormal blood vessels. There is currently no cure, but a team of specialists can help improve quality of life significantly.
Key symptoms:
One limb (arm or leg) that is shorter or smaller than the otherUnderdeveloped or thin bones in the affected areaAbnormal blood vessel patterns visible under the skinSkin discoloration or unusual markings on the affected limbSwelling in the affected limbPain or discomfort in the affected areaReduced muscle mass in the affected limbDifferences in skin temperature between the two limbsSlow or poor wound healing in the affected areaDifficulty using the affected limb fully
Sporadic
Usually appears on its own, not inherited from a parent
Childhood
Begins in childhood, roughly ages 1 to 12
Treatments
No FDA-approved treatments are currently listed for Angioosteohypotrophic syndrome.
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Specialists
View all specialists →No specialists are currently listed for Angioosteohypotrophic syndrome.
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 Angioosteohypotrophic syndrome.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
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.What tests do I need to confirm this diagnosis and rule out similar conditions?,Should I have genetic testing, and what might it tell us?,What specialists should be part of my care team?,What are the most important things to watch for that would need urgent medical attention?,Are there any clinical trials or research studies I could participate in?,How will this condition change over time, and what can I do to slow any progression?,What support resources or patient organizations are available for people with rare vascular and bone conditions?
Common questions about Angioosteohypotrophic syndrome
What is Angioosteohypotrophic syndrome?
Angioosteohypotrophic syndrome is a very rare condition that affects blood vessels and bone development together. The name comes from three key features: 'angio' (blood vessels), 'osteo' (bone), and 'hypotrophic' (underdeveloped or smaller than normal). This syndrome causes abnormal blood vessel growth alongside poor or reduced bone development, typically affecting one limb or a specific part of the body more than others. The affected limb may be shorter, thinner, or weaker than the other side, and the skin and soft tissues in that area may also look different due to the abnormal blood vessel
How is Angioosteohypotrophic syndrome inherited?
Angioosteohypotrophic syndrome follows a sporadic inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Angioosteohypotrophic syndrome typically begin?
Typical onset of Angioosteohypotrophic syndrome is childhood. Age of onset can vary across affected individuals.