Hi, I have a question to ask which is my Aunt is 67 years old and I heard that the muscle from her right arm is like starting to go away (disappearing). I'm not sure how you say this exactly but I heard it's like the muscle is fading away. Her doctor said she should have surgery for it and I was wondering what causes such thing? Is there any specific word or name for such condition if yes what would it be called? Do you think is it some kind of deficiency? Please let me know soon.