The aim of this study is to investigate the proportion of patients with moyamoya disease among the patients who were diagnosed as having intracranial atherosclerotic stroke. To do this, biomarkers (gene and imaging) for moyamoya disease are tested and follow up angiography are performed during follow up (in selected patients).
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Frequency of RNF213 gene variants and HR-MRI findings in patients with intracranial atherosclerosis
Timeframe: Anytime during study period (in intracranial atherosclerosis, HR-MRI findings within 2 weeks)