Hi, not sure if you are still monitoring this sight... but I think I may be diagnosed with AN in my left shoulder. I really wonder if I should be having my right shoulder MRI'd. I don't have pain in my right shoulder yet... but it seems like once you have AN in one joint... best to check the other. I go and see the orthopedic specialist in about a week.... my GP did not have much to say except to refer me after the MRI results. I am 37. how does shoulder replacement work? how are you doing. Thanks.