47-year-old female with a diagnosis of Multiple Sclerosis ,who suffers from progressive tetraparesis, more pronounced in the lower extremities. Her treatment included mitoxantrone and Interferon-beta treatment, both were discontinued because of side effects. Her movement difficulties, due to the left lower limb rigidity, are increasing progressively.

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.