My grandfather is 98, has had skin cancer (primarily on his neck and left arm), and has been treated many years ago(5 or more) and has not had any further issues with it since. Recently he has been complaining of having pain in left humerus in the form of deep coldness, even when I examined and touched it, I found that it was distinctly colder than any other part of his arm. in particular not the muscle tissue, but the actual bone itself. so could you please help me with any ideas of what might be occurring with him??? Thank you Kevin Asato