I'm sorry to hear you have a problem - at this point I will suggest you ask around and see if anyone you know and trust will recommend a good orthopedist, get a 2nd opinion before you have any surgery. I've had 3 rotator cuff surgeries and they had to inplant some cadaver material to sew onto the last time. That was over a year ago and I'm still on pain meds and I doubt if I could cast anything more than a 5 wt for very long.
I know I'll never fish for bonz again. They used a pain pump on the 1st surgery, it malfunctioned and flooded my internal shoulder with stuff and it got infected and didn't heal properly...like I said I'm recovering for the 3rd try. Over 3 years at this point. I'm told I should have the other shoulder done. Don't think so.
LF