Hereditary Cerebral Amyloid Angiopathy: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Hereditary Cerebral Amyloid Angiopathy?
A neurologist usually treats this condition. A neurologist specializes in the brain and nervous system. A primary care doctor often helps coordinate care and reviews medicines. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is hereditary cerebral amyloid angiopathy?
Hereditary cerebral amyloid angiopathy is a rare condition that runs in families. A protein called amyloid builds up in the blood vessels of the brain. This makes the vessels weak. Weak vessels can lead to strokes and bleeding in the brain.
Cerebral amyloid angiopathy, often called CAA, happens when a protein called amyloid sticks to the walls of arteries in the brain. The hereditary form is passed down from parents to children through genes. Weak vessel walls can leak blood or burst.
Symptoms
Symptoms vary from person to person. Common signs include sudden weakness or numbness on one side of the body, trouble speaking, confusion, or a very bad headache. A brain bleed is a medical emergency.
Causes and who gets it
Hereditary cerebral amyloid angiopathy is caused by gene changes called mutations. A person with a gene change has a chance of passing it to each child. The condition is rare and often starts in midlife or later.
How doctors diagnose it
Doctors usually start with a medical history and a brain scan. An MRI can show signs of old bleeds or small injuries to brain tissue. Genetic testing can confirm the hereditary form.
Treatment
There is no cure for hereditary cerebral amyloid angiopathy. Treatment focuses on lowering the chance of bleeding and managing symptoms. Doctors often review all medicines, because blood thinners can raise the risk of a brain bleed.
When to see a doctor
Anyone with sudden weakness, trouble speaking, vision changes, confusion, or a sudden severe headache should get emergency care right away. These can be signs of a stroke or a brain bleed.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. These doctors have longer visits, making it easier to review medicines and track blood pressure.
Common questions
Is hereditary cerebral amyloid angiopathy the same as Alzheimer's disease?
No, they are different conditions, but both involve amyloid protein. In this condition, amyloid builds up in brain blood vessels. In Alzheimer's disease, amyloid builds up in brain tissue itself. Some people can have both conditions at the same time.
Can it be prevented?
Because the hereditary form is passed down through genes, it cannot be prevented. Controlling blood pressure may lower the chance of a brain bleed. Avoiding medicines that raise bleeding risk may also help. A doctor can give advice based on each person's situation.
Should family members get genetic testing?
This is a personal choice that depends on many factors. A genetic counselor can explain the possible results and the limits of testing. They can also explain what testing might mean for insurance or family planning. Talking with a counselor before testing is often recommended.
Can people live normal lives with this condition?
Many people live for years after a diagnosis. This is especially true when bleeds are small and risk factors are managed. Outcomes differ from person to person. Regular follow-up with a doctor helps catch problems early.
Sources
- MedlinePlus Genetics - Hereditary cerebral amyloid angiopathy
- NIH Genetic and Rare Diseases Information Center - Hereditary cerebral hemorrhage with amyloidosis
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.
