[Cognitive Impairment in Adult Patients with Moyamoya Disease].

Moyamoya disease is characterized by stenosis of the terminal region of the internal carotid artery and the development of collateral blood vessels with a smoke-like appearance. It causes cerebral infarction and hemorrhage. However, the occurrence of cognitive impairment in patients with moyamoya disease has been insufficiently addressed. Many patients with moyamoya disease experience difficulties in social life, such as schooling and employment, due to cognitive impairment. This article describes the current cognitive impairment status in patients with moyamoya disease, focusing on the COSMO-Japan Study, a multicenter study on patients with moyamoya disease.