Figure 1 The left calf was shortened by 9 cm compared with the opposite side Figure 2 The left calf frontal radiograph showed a bone defect in the middle part of the left tibia, inversion and retroflexion of the fibula, and fusion of the distal end of the left tibia and fibula Figure 3 The 20-day postoperative radiograph showed that the osteotomy end had been distracted Figure 4 The 7-month postoperative radiograph showed that the tibial stump had slipped 11 cm distally, and the two stumps had overlapped with good growth of the bone scab on the extension end of the ankle Figure 5 The 7-month postoperative general view showed that the deformity was largely corrected Figure 6 The 17-month postoperative radiograph after removal of the external fixation frame showed that the extension end had healed well Figure 6 17-month postoperative front and side x-ray after removal of the external fixation frame shows good healing of the lengthened end Figure 7 full-length lower extremity standing radiograph after removal of the frame shows that both lower extremities are basically equal in length and the force lines are restored Figure 8 cosmetic examination shows that the force lines of both lower extremities are restored