There are reports that actor David Arquette has undergone removal of a benign bone tumor from his face, resulting in damage to a branch of his facial nerve. Apparently the actor cannot move his eyebrow yet, although it is getting better.
Most nerve injuries like this resolve over several weeks to months. It's unlikely that the nerve injury is permanent. I can't imagine how bad I'd feel if I operated on a famous actor and he ended up with a major motor nerve injury. Talk about stress! At least he's not a major beauty like his wife!