This cluster of papers focuses on the pathophysiology, natural history, and management of cerebral aneurysms, with a particular emphasis on aneurysmal subarachnoid hemorrhage, endovascular treatment techniques, cerebral vasospasm, hemodynamics, and complications such as delayed cerebral ischemia. The papers cover a wide range of topics including risk factors, diagnosis, treatment outcomes, and long-term prognosis for patients with cerebral aneurysms.