Fig. (1) Arthroscopic findings of the medial tibiofemoral joint from the anterolateral portal (right knee). Degree of the scar tissue impingement was classified as small in this case, by the length of the scar tissue over the polyethylene line. The scar tissue was connected with the scar tissue over the fat pad. F: femoral component, L: tibial polyethylene liner, S: fibrous scar tissue.