I had my cartridge done back in 2007 which was, at first diagnosed as a Radial ligament tear. The physio actually made my condition so much worse and I ended up being off work for nearly 4 months as the damage to the end of the bone needed extra work whilst he was in there.
My pain was on the side edge around the knee and at the back of the knee.
My only advise is to avoid physio until you know 100% what it is.