Fig. 3From: Over 20 years of chronic patellar ligament rupture with severe knee osteoarthritis for Total knee Arthroplasty: a case reportPreoperative 3D-CT. The left and middle arrows show cystic changes under the medial tibia of the left knee joint. The right arrow indicates patella alta. The Insall-Salvati ratio was 1:3 from preoperative 3D-CT. Compared with the other side, we believe that the height of the left patella is consistent with that of the patella altaBack to article page