Fig. 1

The diagrams of autologous bone marrow injection (1a) and elastic stable intramedullary nail implantation (1b). 1a The bone marrow blood was extracted from the ilium using a bone penetration needle (short solid arrowhead) and injected into the femoral cyst with the guidance of the X-ray fluoroscopy. 1b The holding device (hollow arrowhead) was used to implant the elastic intramedullary needle (long solid arrow) into the femur with the guidance of the X-ray fluoroscopy