Probably some sort of injury. Is the swollen part pliable or does it feel like bone healed up? Would be interesting to see a pic of it skinned out.
Very pliable, did not skin them out, stopped just below them. No indication of injury, either old or new.
Was moving just fine, at least right before the bullet hit him anyway..

Little rutty smelling on those inner glands, but neck was not as big as some I have seen. I think pd is probably right about the swelling of the glands in the leg.
I may see about peeling more skin back later, if I do will post follow-pics.