Figure 2: The arthroscopic findings. (a) The 2-cm osteochondral lesion can be distinguished from the other site, but the articular cartilage of the lesion maintains its continuity with the surrounding cartilage. (b) The lesion is obviously softened compared to the other area. Four absorbable threaded pins are inserted into the center area of the abnormal lesion. (c) The osteochondral fragment is fixed to the humeral head