I have had both GCA and PMR for nearly 8 years. I now need a total knee replacement and was told by the surgeon:
"Replacement hip surgery is more successful than replacement knee surgery. You won't be able to run, jump,kneel down or squat but if your pain level is eight out of ten at the moment it should go down to two out of ten. The biggest risk for you is infection because of your suppressed immune system". Talk to your rheumatologist.
If anyone has had this operation I'd appreciate any advice you could give.