arteriovenous malformation
![](https://a.espncdn.com/photo/2016/0820/r117244_1296x729_16-9.jpg?w=660&r=16%3A9)
Neiron Ball, former Raiders LB, in medically induced coma after aneurysm
Neiron Ball, who overcame a congenital condition in which the brain's blood vessels get tangled and rupture to reach the NFL, is in a medically induced coma after a brain aneurysm ruptured.