25-year-old male suffers from pain in his left knee that shows up after carrying out a limited physical activity. The length and the importance of the pain are proportional to the intensity of the physical activity, the pain is gradual, and is linked to the movement of the knee joint. Knee MRN showed misalignment of the femur and kneecap with the patella, diffuse superficial edema of the kneecap cartilage, and signs of diffuse tendinopathy. In the expert's opinion, the patient suffers from patello-femoral knee pain due to patellar malalignment or patellar maltracking.

65-year-old female that suffers from pain in the left knee underwent examinations that showed femoral-tibial arthrotic manifestations, external degenerative meniscal tear and moderate joint effusion. A diagnosis of external degenerative meniscal tear was established. Further medical tests showed marked degeneration of the meniscal fibrocartilage, diffuse femoral-tibial arthrotic abnormalities, subchondral cysts and edema of the spongious bone, as well as rarefaction of the cartilage matrix, and manifestations of chondropathy.