Patient/caregiver was instructed upon anatomy of knee joint as follows: The knee joint is where the thigh bone (femur) and the leg bone (tibia) meet. A third bone, patella or kneecap, is located in front on the joint between femur and tibia. The knee joint is enclosed in or surrounded by a joint capsule, which is known as a synovium. This joint capsule is a watertight sac surrounding the knee joint, formed by the strong [...]