I have seen something simailar to this when I was hunting. I think that when a deer has suffered an injury I.E. the rear leg the antler growth on the same side of the body suffers. A friend of mine shot a 10 point a few years ago that had a great 5 on the right side but the 5 on the left was deformed. When we got to the buck we found the front left leg was about 5" shorter than the right, when the deer was processed we found that this deer was injured in the left shoulder. It was an old injury, my friend said you could not tell by the way the deer was walking. This looks as though it could be the same sort of deal. If I can find a picture I will post it!