You've got a couple of issues here. A hemangioma is a benign "tumor" of blood vessels so evidently it's grown to the point of causing pressure on the nerves.
As far as the lesions, I guess I'd wait until the next MRI and see what they think. There has to be SOME reason for them.

I don't think I've EVER heard of aging causing lesions on the brain.

Me thinks he's picking at straws!!
Keep us posted, will you? I'll be curious as to what they come up with. God bless and you'll be in my prayers. Hugs, Lee