The reason I thought it could be polymyositis was because I'd read of a Mr. Terry Bott (some of you might have heard of him) who was diagnosed with M.N.D. by a doc in London. As it was too far for him to keep traveling there from Derby he went to a hospital in Sheffield Yorkshire. He saw Professor Pam Shaw, who, after he had a muscle biopsy, told him he had Polymyositis. One can hope though.
Keep smiling, Cherry.