It's Pano, in his humerus. The surgeon seemed impressed that I guessed that's what it might be and was glad I had already done some research. I am sooooooo relieved to know once and for all what the heck the problem is. They said his left, as well as hips and knees all appear normal. He wants us to come back in 2 mos if he is still lame. Umm..I read on the notes they wrote about his physical exam that he has 'moderate to severe muscle atrophy of the right forelimb'.. is that from the Pano too? He didn't mention that.
Anyway, he said the Pano was visible on the x-rays that we brought, his bone being dense and larger than the left where you can see the inflamation.
Anyway, even if they told us it will go away on it's own, I think that was the best $95 spent to get someone that actually knew what they were doing. They were really great there.
After puking once the way there and once on the way back..he's all tuckered out now. Oh, and he gained a pound.