Medfödd eller förvärvad utbuktning i kärlväggen av blodkärl i hjärnan. Säck- eller bärformade åderbråck är den vanligaste varianten och bildas oftast vid artärförgreningar nära hjärnbasen. Bristning leder till subaraknoidalblödning eller intrakraniella blödningar. Jätteaneurysm (>2,5 cm i tvärsnitt) kan trycka ihop intilliggande vävnadsstrukturer, inkl. okulomotoriska nerven (tredje hjärnnerven).
Abnormal outpouching in the wall of intracranial blood vessels. Most common are the saccular (berry) aneurysms located at branch points in CIRCLE OF WILLIS at the base of the brain. Vessel rupture results in SUBARACHNOID HEMORRHAGE or INTRACRANIAL HEMORRHAGES. Giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the OCULOMOTOR NERVE. (From Adams et al., Principles of Neurology, 6th ed, p841)
Aneurysm i hjärnan — Cerebral aneurysm — Intrakraniell aneurysm
Aneurysms, Intracranial — Intracranial Aneurysms — Aneurysm, Intracranial — Aneurysm, Anterior Communicating Artery — Anterior Communicating Artery Aneurysm — Aneurysm, Basilar Artery — Aneurysms, Basilar Artery — Artery Aneurysm, Basilar — Artery Aneurysms, Basilar — Basilar Artery Aneurysms — Basilar Artery Aneurysm — Aneurysm, Middle Cerebral Artery — Middle Cerebral Artery Aneurysm — Aneurysm, Posterior Cerebral Artery — Posterior Cerebral Artery Aneurysm — Berry Aneurysm — Aneurysm, Berry — Aneurysms, Berry — Berry Aneurysms — Brain Aneurysm — Aneurysm, Brain — Aneurysms, Brain — Brain Aneurysms — Cerebral Aneurysm — Aneurysms, Cerebral — Cerebral Aneurysms — Aneurysm, Cerebral — Giant Intracranial Aneurysm — Aneurysm, Giant Intracranial — Aneurysms, Giant Intracranial — Giant Intracranial Aneurysms — Intracranial Aneurysm, Giant — Intracranial Aneurysms, Giant — Mycotic Aneurysm, Intracranial — Aneurysm, Intracranial Mycotic — Aneurysms, Intracranial Mycotic — Intracranial Mycotic Aneurysm — Intracranial Mycotic Aneurysms — Mycotic Aneurysms, Intracranial — Aneurysm, Anterior Cerebral Artery — Anterior Cerebral Artery Aneurysm — Aneurysm, Posterior Communicating Artery — Posterior Communicating Artery Aneurysm