some doctors said its very likely that his hand and elbow might be actually in much better condition than meets the eye. I have no medical background at all, in any language, so won't even try to translate what I've read to english to avoid unnecessary confusion, as I can't verify it even in polish
There's supposedly some kind of growth on the bones, limiting movement, and its normal after the treatment that Robert have been subjected to. At some point after the surgeries, it can be removed and the movement is restored.
At least that's how I understood it ;p