Wu J, et al. - The therapeutic effect of percutaneous autologous bone marrow transplantation (PABMT) was examined in children with delayed union of limb bone. In addition, the authors analyzed its influence in relation to delayed bone union therapy, transplantation period, patients’ sex, fracture location, and fracture fixation. For the treatment of delayed union of limb bone in children, PABMT was found to be a minimally invasive and effective strategy. As per the outcomes, the early surgical treatment facilitated the fracture healing, reduced the number of transplantation, and shortened the course of treatment.