They had to remove part of the skull because of swelling. Similar to what they did with John Graziano, the kid that was in the car Nick Hogan wrecked:
With serious head trauma like that the brain swells, there's hemmoraging, etc, if you don't do something drastic, like the above, the person will die. Eventually when they are postitive the swelling has subsided, as they have done with Graziano, they will put something in place to protect the brain and restore a more normal appearance.
Shit sucks though, I'd rather die than live a vegetable.
