Park YC, Um KS, Kim DJ, et al. - In this study, femoral neck shortening and treatment outcomes of in situ fixations and fixation after reduction were compared for severe valgus-impacted femoral neck fractures in patients aged 65 years or younger. This retrospective study included 55 patients who underwent internal fixation with three parallel screws for femoral neck fractures with valgus impaction >15° (AO/OTA classification 31-B1.1) between January 2006 and December 2018. The results exhibited that internal fixation after reduction for severe valgus-impacted femoral neck fractures was found to be safe and effective for achieving successful bone union and restoring the femoral neck length in patients aged 65 years or younger.