**2. Epidemiology**

Cerebral arteriovenous malformations are rare, found in around 0.1% of the population and one-tenth (1/10th) of the incidence of the brain aneurysms. About 15% of cAVMs remain asymptomatic based on autopsy series. The majority (90%) of cAVMs are found in the supratentorial region, the remaining 10% occur in the posterior fossa. cAVMs commonly occur as single lesions, and in 9% of the patients, there are multiple AVMs [1, 2]. cAVM has no gender preference.

cAVM causes subarachnoid hemorrhages in 9% of the patients. The mean age of presentation is 30–40 years; 3% of young patients had stroke due to cAVM. It also causes primary intracerebral hemorrhage in 33% of young adults [3].
