Overview
COL4A1 and COL4A2-related cerebral small vessel disease with hemorrhagic tendency is a rare inherited condition caused by changes (mutations) in the COL4A1 or COL4A2 genes. These genes provide instructions for making a protein called type IV collagen, which is a key building block that helps keep blood vessel walls strong and flexible. When these genes are not working properly, the walls of small blood vessels in the brain become fragile and prone to leaking or bleeding. This condition is sometimes referred to as COL4A1/COL4A2-related brain small vessel disease. The disease mainly affects the brain's tiny blood vessels, leading to a range of serious neurological problems. People with this condition may experience strokes (including bleeding strokes called hemorrhagic strokes), seizures, migraines with aura, and gradual decline in thinking and memory. Some individuals also develop problems with movement, muscle stiffness, or weakness. Symptoms can begin at any age, from before birth through adulthood, and the severity varies widely even within the same family. There is currently no cure for this condition. Treatment focuses on managing symptoms and reducing the risk of further strokes or bleeding. This includes careful blood pressure control, avoiding medications that thin the blood (like aspirin or anticoagulants) when possible, and treating seizures with anti-epileptic drugs. Regular monitoring by a neurologist and other specialists is an important part of care. Early diagnosis through genetic testing can help guide treatment decisions and allow families to understand their risk.
Key symptoms:
Hemorrhagic stroke (bleeding in the brain)Seizures or epilepsyMigraines, often with visual disturbances (aura)Muscle weakness or stiffness on one side of the bodyProblems with balance and walkingMemory loss or difficulty thinking clearlyWhite matter changes seen on brain MRIPorencephaly (fluid-filled cavities in the brain, sometimes present from birth)Eye problems, including abnormal blood vessels in the retinaKidney problems (in some cases)Muscle cramps or painFatigueMood or behavioral changes
Autosomal dominant
Passed on from just one parent; each child has about a 50% chance of inheriting it
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency.
View clinical trials →Clinical Trials
View all trials with filters →No actively recruiting trials found for COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency at this time.
New trials open frequently. Follow this disease to get notified.
Specialists
View all specialists →No specialists are currently listed for COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency.
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 COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency.
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.Which gene is affected in my case — COL4A1 or COL4A2 — and what does that mean for my prognosis?,Should my family members be tested, and if so, who should be tested first?,What blood pressure target should I aim for, and which medications are safest for me?,Are there any medications or activities I should strictly avoid to reduce my risk of bleeding?,How often should I have brain MRI scans to monitor for changes?,What are the early warning signs of a stroke that should prompt me to call emergency services immediately?,Are there any clinical trials or research studies I might be eligible to join?
Common questions about COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency
What is COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency?
COL4A1 and COL4A2-related cerebral small vessel disease with hemorrhagic tendency is a rare inherited condition caused by changes (mutations) in the COL4A1 or COL4A2 genes. These genes provide instructions for making a protein called type IV collagen, which is a key building block that helps keep blood vessel walls strong and flexible. When these genes are not working properly, the walls of small blood vessels in the brain become fragile and prone to leaking or bleeding. This condition is sometimes referred to as COL4A1/COL4A2-related brain small vessel disease. The disease mainly affects the
How is COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency inherited?
COL4A1 or COL4A2-related cerebral small vessel disease with hemorrhagic tendency follows a autosomal dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.