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)
Entry Term(s)
Aneurysm, Anterior Cerebral Artery
Aneurysm, Anterior Communicating Artery
Aneurysm, Basilar Artery
Aneurysm, Cerebral
Aneurysm, Intracranial
Aneurysm, Middle Cerebral Artery
Aneurysm, Posterior Cerebral Artery
Aneurysm, Posterior Communicating Artery
Anterior Cerebral Artery Aneurysm
Anterior Communicating Artery Aneurysm
Basilar Artery Aneurysm
Berry Aneurysm
Brain Aneurysm
Cerebral Aneurysm
Giant Intracranial Aneurysm
Middle Cerebral Artery Aneurysm
Mycotic Aneurysm, Intracranial
Posterior Cerebral Artery Aneurysm
Posterior Communicating Artery Aneurysm
NLM Classification #
WL 355
Public MeSH Note
2000; see CEREBRAL ANEURYSM 1969-1999; for CEREBRAL ANEURYSM see CEREBRAL ANEURYSM 1966-1999
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)
