AUTHOR=Lai Lili , Li Yifan , Shen Miaoda , Wang Xuanwei , Zhong Cheng , Xu Sanzhong TITLE=Treatment of postoperative non-union with internal fixation loosening of Garden IV femoral neck fracture with teriparatide in a young adult: A case report JOURNAL=Frontiers in Surgery VOLUME=Volume 9 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2022.938595 DOI=10.3389/fsurg.2022.938595 ISSN=2296-875X ABSTRACT=Background: Postoperative nonunion of femoral neck fracture often needs secondary operation. We report a case of postoperative nonunion of femoral neck fracture treated with teriparatide. Case presentation: A young male patient with Garden IV femoral neck fracture who had no obvious signs of healing 3 months after percutaneous hollow nail fixation which the fracture line was enlarged and the hollow nail was withdrawn. Bone nonunion healed after 6 months continuous subcutaneous injection of 20 mg/day of teriparatide after the patient refused a secondary surgery. As far as we know, there are no relevant reports yet. Conclusions: Teriparatide is expected to treat young patients with a displaced femoral neck fracture who have difficulty in healing before nonunion and avoiding secondary surgery.