ABSTRACT
Asymptomatic and symptomatic cerebral arteriovenous malformations (AVMs) have a risk of hemorrhage of 2% to 4% per year with a combined morbidity and mortality rate of 50% (1,2). However, the literature suggests that deep paraventricular AVMs may have a higher risk of hemorrhage (and subsequent rebleeding), a higher associated risk of morbidity and mortality, and a significantly higher treatment risk than the more superficial convexity AVMs (3-9). In contrast to convexity lesions, paraventricular AVMs are hidden by normal parenchyma, making their localization and the surgical approach to the feeding and draining vessels more difficult.
