Injury and preoperative and postoperative status of a 56-year-old man. Left distal clavicle fracture (Neer type II) (A). Hook plate fixation (B). The bone was healed 1 month after surgery, but the patient still complained of omalgia (C). After removal of internal fixation (D), extrusion of clavicular hook on supraspinatus was observed (E) under shoulder arthroscopy.