OH NO, stop .. do not have surgery whilst on steroids, my friend had a simple arthroscopy and didnt tell the doctors he was using(500mg test a week) and his blood would not clot, they stiched the 1cm incision closed but the blood just kept building up underneath near his knee, it eventually burst at home, (he thought the swelling was from surgery) HE COULD SEE HIS WHOLE KNEE!! he fainted had to go hospital and took him a year to recover, so hopefully everything went ok with your wisdoms