Overview
COL4A1 and COL4A2-related cerebral small vessel disease with ischemic tendency is a rare inherited condition that affects the small blood vessels in the brain. It is caused by changes (mutations) in either the COL4A1 or COL4A2 gene, which provide instructions for making a protein called type IV collagen. This protein is a key building block of the thin membranes that surround and support blood vessels throughout the body, especially in the brain. When this protein does not work properly, the walls of small blood vessels become fragile and prone to damage. The disease mainly affects the brain, causing a range of problems related to poor blood flow and vessel injury. People with this condition are at increased risk of ischemic strokes (strokes caused by blocked blood flow), as well as small areas of bleeding in the brain. Over time, white matter changes — areas of damage visible on brain scans — can build up and lead to thinking and memory problems, difficulty walking, and other neurological symptoms. Some people also experience migraines, seizures, or muscle weakness. There is currently no cure for this condition. Treatment focuses on reducing stroke risk, managing symptoms, and protecting the brain from further damage. This typically includes blood pressure control, avoiding certain medications that increase bleeding risk, and lifestyle changes. The condition is sometimes referred to as COL4A1-related brain small vessel disease or COL4A2-related cerebrovascular disease.
Key symptoms:
Stroke or stroke-like episodes, especially at a young ageTransient ischemic attacks (mini-strokes)Migraines, sometimes with visual disturbances (aura)Seizures or epilepsyMemory problems and difficulty thinking clearlyMuscle weakness, often on one side of the bodyDifficulty walking or problems with balance and coordinationWhite matter changes seen on brain MRI scansSmall areas of bleeding in the brain (microbleeds)Leukoencephalopathy (widespread damage to the brain's white matter)Porencephaly (fluid-filled cavities in the brain, sometimes present from birth)Eye abnormalities such as abnormal blood vessels in the retinaKidney problems in some casesMuscle cramps or stiffness
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 ischemic 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 ischemic tendency at this time.
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Specialists
View all specialists →No specialists are currently listed for COL4A1 or COL4A2-related cerebral small vessel disease with ischemic 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 ischemic 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 specific risk?,Should my family members be tested, and if so, who should be tested first?,What is my personal risk of having a stroke, and what can I do to reduce it?,Are there any medications or activities I should avoid because of my fragile blood vessels?,How often should I have brain MRI scans to monitor for changes?,Are there any clinical trials or research studies I could participate in?,What specialists should be part of my care team, and how often should I see each of them?
Common questions about COL4A1 or COL4A2-related cerebral small vessel disease with ischemic tendency
What is COL4A1 or COL4A2-related cerebral small vessel disease with ischemic tendency?
COL4A1 and COL4A2-related cerebral small vessel disease with ischemic tendency is a rare inherited condition that affects the small blood vessels in the brain. It is caused by changes (mutations) in either the COL4A1 or COL4A2 gene, which provide instructions for making a protein called type IV collagen. This protein is a key building block of the thin membranes that surround and support blood vessels throughout the body, especially in the brain. When this protein does not work properly, the walls of small blood vessels become fragile and prone to damage. The disease mainly affects the brain,
How is COL4A1 or COL4A2-related cerebral small vessel disease with ischemic tendency inherited?
COL4A1 or COL4A2-related cerebral small vessel disease with ischemic tendency follows a autosomal dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.