Radiation Induced Plexopathy

Hi All.  I used to be a regular on this board.  Diagnosed SCC unknown primary in April 2010.  Had surgery only and was considered cured 5 years later.

in 2017 I was diagnosed with SCC unknown primary a second time. Ended up finding a tumor on the right BOT.  This time I had radiation and chemo and I am still cancer free over three years later.

Starting last fall I started to experience numbness and tingling in my right forearm and hand.  It has since moved to my upper right arm and I have experienced diminished strength.  A couple of MRIs later it looks like I have radiation induced plexopathy or neuritis.

Has anyone else experienced this?  Everything I've heard is that the condition worsens until the limb is practically useless.  I'm looking for some positive news from someone in a similar boat.  I play bass guitar and I am a photographer.  So far I can manage those things but I am concerned that if this worsens I won't be able to do those things at the same level or at all.

Thanks and God bless!

Joel