Short answer · Medically reviewed summary · Last updated: 2026-05-08
TL;DR: CADASIL is diagnosed through a combination of clinical assessment, brain MRI imaging, and definitive genetic testing for mutations in the NOTCH3 gene. If you suspect you have CADASIL, consult a neurologist to discuss your family history and specific neurological symptoms, as early identification is key to managing vascular risk factors. What are the early signs of CADASIL? CADASIL (Cerebral Autosomal Dominant Arteriopathy With Sub-Cortical Infarcts And Leukoencephalopathy) typically presents in adulthood, often between ages 30 and 50.
How do I know if I have Cadasil (Cerebral Autosomal Dominant Arteriopathy With Sub-Cortical Infarcts And Leukoencephalopathy)?
Could you have Cadasil (Cerebral Autosomal Dominant Arteriopathy With Sub-Cortical Infarcts And Leukoencephalopathy)? Early signs that prompted real patients to seek diagnosis, plus medically reviewed guidance.
TL;DR: CADASIL is diagnosed through a combination of clinical assessment, brain MRI imaging, and definitive genetic testing for mutations in the NOTCH3 gene. If you suspect you have CADASIL, consult a neurologist to discuss your family history and specific neurological symptoms, as early identification is key to managing vascular risk factors.
What are the early signs of CADASIL?
CADASIL (Cerebral Autosomal Dominant Arteriopathy With Sub-Cortical Infarcts And Leukoencephalopathy) typically presents in adulthood, often between ages 30 and 50. Common early indicators include migraine with aura (which can be severe or atypical), recurrent strokes or transient ischemic attacks (TIAs), and progressive cognitive decline. Unlike common age-related memory loss, CADASIL often involves executive dysfunction—difficulty with planning, organization, and focus—early in the disease course.
How is CADASIL diagnosed?
Because CADASIL is a hereditary condition, a detailed family history is the first step in the diagnostic process. Physicians look for a pattern of early-onset strokes or dementia in multiple generations. The diagnostic pathway usually involves:
- Brain MRI: Highly sensitive imaging often reveals characteristic white matter hyperintensities, particularly in the anterior temporal lobes.
- Genetic Testing: A blood test for NOTCH3 gene mutations is the gold standard to confirm a CADASIL diagnosis.
- Skin Biopsy: In some cases, a skin biopsy can be performed to look for specific deposits (GOM) in the blood vessel walls if genetic results are inconclusive.
When should I see a doctor?
If you have a known family history of CADASIL or are experiencing recurrent neurological episodes, you should request a referral to a neurologist or a vascular neurologist. When speaking with your provider, bring a written summary of your symptoms and a family health tree. If your concerns are dismissed, advocate for yourself by requesting a consultation with a neuro-geneticist or a specialist at a major academic medical center familiar with rare small-vessel diseases.
Red flags requiring urgent evaluation
Seek emergency medical attention if you experience sudden-onset weakness, numbness, facial drooping, difficulty speaking, or sudden severe confusion, as these may indicate an acute stroke associated with CADASIL.
Next steps
- Consult a neurologist about your specific symptoms and family history.
- Request a brain MRI if you have unexplained migraine patterns or cognitive changes.
- Connect with the 57 members of the DiseaseMaps CADASIL community to share experiences.
- Explore resources from the NIH Genetic and Rare Diseases (GARD) Information Center.
Medical disclaimer: This content is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases (GARD) Information Center: CADASIL.
- Orphanet: Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy.
- OMIM (Online Mendelian Inheritance in Man): NOTCH3 gene entry.
- The CADASIL Foundation: Patient resources and educational materials.
