CADASIL
CADASIL
Also known as:CADASIL、CADASIL (Cerebral Autosomal Dominant Arteriopathy With Subcortical Infarcts and Leukoencephalopathy)、NOTCH3-Related Cerebral Small Vessel Disease
CADASIL is a NOTCH3-related hereditary small vessel disease of the brain, which can cause migraine with aura, recurrent lacunar strokes, mood changes, cognitive decline, and white matter changes.
Start Here
A quick guide to the next step: which department to start with, what to prepare, and what to ask.
When younger or middle-aged patients have recurrent transient ischemic attacks/strokes, migraine with aura, prominent white matter changes on brain MRI, or a family history of multiple relatives with early-onset stroke/dementia, they can visit the neurology cerebrovascular disease clinic or inherited neurological disorder clinic.
CADASIL affects small-to-medium-sized arteries in the brain, causing white matter lesions and lacunar ischemic events. It is different from ordinary small vessel disease caused by hypertension or atherosclerosis.
Currently focused on stroke risk management, symptom control, rehabilitation, and genetic counseling; there is no universally applicable cure.
Yes, usually autosomal dominant inheritance, related to pathogenic variants in NOTCH3.
White matter changes on imaging are often attributed to hypertension, aging, or common migraine; if the age of onset is relatively young, family history is significant, or MRI distribution is typical, hereditary small vessel disease should be considered.
This page helps patients and families organize care leads. It does not replace a clinician’s diagnosis or treatment plan. For testing, medication, referrals, emergency care, and support applications, follow qualified clinicians, medical institutions, support organizations, and official sources.
Diagnosis Path
Organized around the practical patient journey: identify clues, avoid common delays, then prepare for care.
When to Suspect It
- Recurrent lacunar cerebral infarctions or transient ischemic attacks appearing around age 40-50 or earlier.
- Migraine with aura, mood changes, or cognitive decline co-occurring with white matter lesions on brain MRI.
- Brain MRI showing extensive white matter hyperintensities, especially in suggestive locations such as the temporal poles or external capsule.
- Multiple relatives in the family with early-onset stroke, gait problems, cognitive decline, or psychiatric/behavioral changes.
Common Wrong Turns
- Treating only as common migraine without brain MRI and family history review.
- Explaining white matter changes in young patients simply as stress or aging.
- For recurrent minor strokes, only controlling blood pressure and lipids without assessing for hereditary small vessel disease.
- Conducting predictive testing on asymptomatic relatives without genetic counseling.
Departments to Start With
- Neurology Cerebrovascular Disease Clinic
- Inherited Neurological Disorder Clinic
- Medical Genetics Department/Genetic Counseling Clinic
- Rehabilitation Medicine Department
- Psychiatry/Psychology Department (for mood or behavioral issues)
Before the Visit
- Compile all brain MRI/CT, stroke records, migraine history, and cognitive/mood change documentation.
- Map the spectrum of stroke, migraine, dementia, and psychiatric symptoms in the family.
- Ask about NOTCH3 gene testing and interpretation of results.
- Discuss whether, when, and how asymptomatic relatives should undergo predictive testing.
- Establish a plan for stroke prevention, rehabilitation, cognitive support, and psychological support.
Tests to Ask About
- Brain MRI and cerebrovascular assessment.
- NOTCH3 gene testing.
- Skin biopsy with electron microscopy/immunohistochemistry when necessary.
- Blood pressure, lipids, blood sugar, and other modifiable stroke risk assessments.
- Cognitive, mood, and gait function assessments.
Questions for the Doctor
- Do my MRI and medical history fit CADASIL?
- Is the NOTCH3 variant sufficient to confirm the diagnosis?
- Which stroke risk factors need active management?
- What genetic counseling process is needed for testing relatives?
- How should cognitive, emotional, and work/life support be arranged?
Basic Information
Medical Notes
More complete medical explanations are kept here for discussion with clinicians.
Symptoms
CADASIL can present with migraine with aura, transient ischemic attacks, recurrent lacunar cerebral infarctions, gait instability, mood disorders, apathy, executive dysfunction, and progressive cognitive impairment. Symptoms and age of onset may vary within and between families.
Diagnosis
Diagnosis relies on clinical presentation, characteristic brain MRI findings, family history, and NOTCH3 gene testing. When genetic results are inconclusive, some cases may require skin biopsy to look for characteristic vascular changes. Doctors will also differentiate from hypertensive small vessel disease, multiple sclerosis, inflammatory vasculitis, and other hereditary white matter disorders.
Treatment
Management focuses on reducing modifiable stroke risks, managing migraine and mood/cognitive problems, rehabilitation training, and family support. Strategies such as antithrombotic therapy, blood pressure control, and lipid management should be decided by neurology specialists based on individual circumstances and cannot simply be copied from standard stroke protocols.
Long-term Care
Long-term follow-up focuses on stroke recurrence, gait, cognition, mood, work capacity, driving safety, and care arrangements. Patients and families should keep records of imaging, genetic reports, and emergency instructions.
Fertility and Family
CADASIL is usually inherited in an autosomal dominant pattern. First-degree relatives are at risk, but asymptomatic predictive testing should be performed after adequate genetic counseling, with particular discussion of psychological impact, insurance/employment implications, and personal informed choice.
When to Seek Urgent Care
Sudden facial droop, limb weakness or numbness, speech difficulty, visual abnormalities, severe headache, or altered consciousness should prompt immediate stroke emergency care, with notification of CADASIL or familial small vessel disease risk.
Prognosis
Disease course varies considerably, influenced by stroke recurrence, cognitive changes, family variants, and management of modifiable risk factors.