Han J, Wang W, Yu X, et al. - This study was undertaken to explore the clinical effects and complications that may arise as a result of ipsilateral clavicle turnover during tumorous bone defect repair of the proximal humerus and to investigate the utility of performing combined free fibula transplantation and internal fixation in reducing complications. Between September 1998 and February 2020, 13 patients with clavicle turnover or free fibular transplantation were treated. For the treatment of tumorous bone defects of the proximal humerus, clavicle turnover was found to be a feasible method. The most common complication was the flipping clavicle fracture. The outcomes suggested that the application of total clavicle fixation and free fibular transplantation strengthens the flipping clavicle and decreases the risk of clavicle fracture.