Alice
Hi
Your post took a while to hit the forum, new ones always go through the moderator and last night seems to have been a busy night on here.
If Pete's last two tests have been undetectable then that is a really good sign that the cancer is pretty inactive. It is unlikely for bone mets to be there with a diagnosis at a T3 locally advanced non metastatic stage but it can happen. HT often causes muscle pains and general aches and pains as men can lose muscle tone over time.
I was reminded recently by a few other posts on here that we all tend to jump straight to the PCa as the root cause of any medical issue which is only natural, but not necessarily right.
If Peter played any sport or does any physical activity like decorating, gardening etc. then there may be just normal age related (even at 48) wear and tear in his shoulder joint. Most of us get a little arthritis somewhere and those who were sport active more so.
Your GP should be able to advise of any action he might deem necessary to allay your fears, hopefully using a topical pain reliever or taking an anti inflammatory drug like ibuprofen will sort this out.
I wish you all the very best
xx
Mo