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Moyamoya disease is a progressive disease of the blood vessels at the base of the brain. For patients with Moyamoya disease, the carotid artery becomes blocked, disrupting blood flow throughout the brain. To restore blood flow, blood vessels will open at the base of the brain; however, these blood vessels cannot supply the proper amount of blood to the brain. This can cause bleeding and permanent brain damage if left untreated.
Moyamoya Disease Symptoms:
Moyamoya tends to affect children, as well as adults in their 30s or 40s. Typically, children’s symptoms resemble stroke symptoms, such as weakness of an arm or leg or seizures. Adults tend to show signs of transient ischemic stroke—or mini strokes—or hemorrhagic stroke.
Symptoms from Moyamoya disease can be permanent or come and go. While each patient may experience different symptoms, generally signs of stroke or mini stroke symptoms include:
- Speech difficulties
- Paralysis of part of the body
- Loss of consciousness
Imaging of the blood vessels is the only way to diagnose Moyamoya disease. This can be done with a range of imaging technology, including MRI, CT scans and nuclear medicine.