My diagnosis was from my PMD. He had me go see my neurologist for confirmation. My OT therapists also had an idea that it was RSD. Mine was diagnosed after my 3rd surgery for a median nerve release on my arm. The surgeon opened it end to end. Looking back now I think the RSD was presenting after the 2nd surgery. My surgeries were all within a year and a half of each other. If I could do it all over again I wouldn't have had the final 2 surgeries as it resulted in nerve damage and RSD.
I like Loretta had good results from therapy. I don't think I would have any use of my hand if it wasn't for my therapists. It gave me movement in my fingers... although they are still a little curved in. It helped give me a little strength in the hand and work on the sensitivity to touch.
IMO surgeons want to cut. They generally don't seem to say things like let's try and help this without surgery. I may be jadded as my surgeries didn't end well and my surgeon was an arrogant idiot