Moyamoya Syndrome Risk Factors & Causes

Age

Moyamoya syndrome might develop at any age, but the symptoms overwhelmingly present in children rather than adults. When adults do develop Moyamoya disease, they tend to be between thirty and fifty, and children are usually between five and ten. It's very uncommon for adolescents, young adults, and the elderly to develop Moyamoya disease.

The first symptom that manifests is usually a stroke, though it might manifest as recurrent transient ischemic attacks, something particularly common in children. Adults with the disease might experience these types of symptoms, but they're more likely to suffer brain bleeding due to abnormal vessels in the brain.