I am real surprised that LS was the first thing that came to mind, hmmm. i would be thinking maybe ears also, there is an area just inside the middle ear that is partly responsible for balance, and then I would ask about neurological problems, maybe something in the brain, thats what would have come to my mind, but I'm only a nurse...
I do hope and pray that things are diagnosed quickly and recovery is speedy. We are sending hugs from Texas from Yogi, Dori, Bogus and Maggie Doodle.