- Cerebral ischemia (lack of blood to the brain)
- Cerebral hemorrhage (the bleeding, rupture of an artery in the brain)
Age distribution at the start of Moyamoya disease has two peaks:
- Children below the age of 10- cerebral ischemia is common
- Adults between 30 and 40 years of age- hemorrhage is common
Children with Moyamoya disease usually come into a hospital or emergency room with symptoms of stroke:
- Weakness on one side of the body
- Slurred speech
- Impaired vision
Further symptoms of Moyamoya include:
- Nausea
- Vomiting
- Intense headache
- Lethargy
- Vision changes
- Numbness or weakness on one side or in one part of the body
- Seizures
A Transient Ischemic Attack (TIA), the blood supply to the brain reduces, can also occur, usually lasting several minutes.
TIA may result in some of the following:
- Consciousness disturbance
- Weakness of the arm and/or foot
- Slurred speech
- Involuntary movement of the arm or leg
