A very interesting discussion here - and a typical shoulder case - very difficult to diagnose. We don't really have any specific test for the different lesions of the shoulder. The testing we have cery often test for two or more lesions. Your frustration is understandable. You must have at RC lesion ++ - even a partial lesion will have improved after what you have done to it. Spontaneous lesions like this happens, but are very difficult to isolate. The white spots you describe on the Wikipedia reference-linkMRI could be liquid as a sign of inflamation. If you have a lesion, you also have an inflamation. You most likely will need some kind of reconstruction. Good luck