Management of pediatric femoral neck fractures from classification to surgery: a review of indications based on anatomic and radiographic features of the proximal femur.

This review focuses on the anatomic and radiographic characteristics of the pediatric proximal femur and the advantages and disadvantages of different protocols for the management of pediatric femoral neck fractures (PFNFs) in terms of fracture classification, reduction methods, reduction quality and fixation methods, with the goal of proposing an optimal treatment protocol for PFNFs to reduce the incidence of postoperative complications. The anatomic and radiographic characteristics of the pediatric proximal femur, including the presence of an active growth plate, an immature femoral calcar, greater trabecular density and plasticity and a relatively immature blood supply are very different from those of the adult proximal femur. Treatment protocols for PFNFs must differ from those for adult femoral neck fractures. PFNFs with posterior translation, and those with comminuted medial-posterior columns, are associated with a higher postoperative complication rate. This review suggests that the degree of damage to the nutrient vessels along the posterior femoral neck and the stability of the medial-posterior column of the femoral neck should be well assessed in patients with PFNFs for both classification and treatment purposes. Anatomic reduction through an anterior approach, placement of a small number of implants in the mid-inferior part of the femoral neck and additional external support are effective in reducing postoperative complications in patients with PFNFs.