Fig. 5
a Preoperative radiographs of a 11-year-old girl. The radiolucent lesion (arrows) and bone cortical erosion in CT and MRI were visible in the proximal tibia. b and c were the X-rays of 3 and 5 years in the course of follow-up. We can see that the density of the tumor cavity become more and more high in the X-ray postoperative. Eight years later, the troubled limb was shorten by 14 mm compared with the healthy limb and mild varus deformity but had a satisfied function of the knee (d)