The goal of this prospective observational cohort study is to learn about treatment strategies for unruptured intracranial aneurysms in the Chinese population. The main questions it aims to answer are: * To establish a cohort of patients with intracranial unruptured aneurysm and explore the optimal clinical treatment strategy. * To establish clinical management path for patients with unruptured intracranial aneurysm. According to the treatment of all patients with unruptured intracranial aneurysm, they were divided into the following groups: 1. Conservative treatment group; 2. Intracranial aneurysm clipping group; 3. Coil embolization or stent-assisted coil embolization group; 4. Flow diversion group.
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Primary Outcome
Timeframe: 2 years