Rest, ice, compression and elevation of the joint is the first step in the treatment. Nonsteroid anti-inflammatory drugs and dietary supplements are recommended. If severe effusion and loose body is present arthroscopic removal and treatment of the damage may be necessary. Arthroscopy is also useful for the assessment of the cartilage lesion as the extent of the affected area and its relation to other lesions (mirror or kissing lesions) is crucial in the decision for treatment option. Similar chondral defects in adolescent and adult patients have a lot worse expectation for spontaneous healing than the young ones. The usually applied cartilage repair methods would be (depending mostly on the size of the lesion): microfracture, mosaicplasty, cartilage cell implantation or large allograft implantation.