The measurement definitions of the patellar length (PL), patellar ligament length (PLL), and size of the femoral condyle (FC).The PL was measured as the longest dimension of the patella. The PLL was measured from the most distal portion of the patella to the patellar ligament insertion on the cranioproximal portion of the tibial tuberosity. The FC was measured from the origin of the long digital extensor muscle to the caudal femoral cortex along the Blumensaat’s line.