Wow that is really unique.
I agree with fastetti he needs to be culled. Doesn't matter if its genetics or injury that causes the deformed antlers. The meat should be checked over very carefully before consuming. If it is genetics and he passes this issue on it weakens the herd. If it is caused from injury he will still taste great. Plus you could keep the unique rack. I love getting a buck with a really wicked rack, doesn't matter to me if it is the biggest.