Most commonly located on the anterior part of circle of Willis (particularly on anterior or posterior communicating arteries, at the bifurcation of middle cerebral artery and at the bifurcation of internal carotid artery.
Forms
Most common are saccular .other forms are fusiform, diffuse, globular etc.
Clinical features
1. Asymptomatic
2. focal neurological deficit
3. headache
4. Transitory internal weakness, numbness, tingling, or speech disturbance.
5. if rupture then loss of consciousness and death
diagnosis
CSF examination will show blood stains
EEG =side of hemorrhage
Angiography and CT scan.
Management
Surgical by clipping, tigating the neck of the aneurysm.
Medical
Bed rest
Aminocaproic acid (fibrinolytic) 24 g/day i/v for 3 weeks
Sedatives and analgesics.