TOPICS: Prepatellar bursitis, patellar fracture, iliotibial band syndrome, Osgood-Schlatter disease (traction apophysitis), popliteal synovial cyst (Baker’s cyst), medial tibial stress syndrome, compartment syndrome, iliotibial band, lateral femoral epicondyle, gastrocnemius-semimembranosus bursa, popliteal fossa, articular cartilage, synovial membrane, articular capsule, synovial fluid, synovium, posterior cruciate ligament, anterior cruciate ligament, suprapatellar bursa, prepatellar bursa, synovial cavity, infrapatellar bursa, patellar ligament, bursae of the knee, tensor fasciae latae muscle, iliotibial band, quadriceps femoris tendon, patellar ligament, patella, tibial tubercle, inguinal ligament, adductor longus, sartorius, semitendinosus, semimembranosus, biceps femoris, gastrocnemius, plantaris, soleus