A brain aneurysm — also known as a cerebral aneurysm or intracranial aneurysm — is a bulge or ballooning in a blood vessel in the brain. An aneurysm often looks like a berry hanging on a stem.

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Background To compare the effects of endovascular coiling and neurosurgical clipping in patients with unruptured intracranial aneurysm. Methods Sixteen electronic databases were searched for ...