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Fig. 3D. —14-year-old boy with intercalary reconstruction of proximal tibia for fibrosarcoma. Dotted line on radiographs corresponds to level of CT images. CT scan at 4 years (obtained 3 years after C) shows fracture (arrow) of allograft, although small ossifications (arrowhead) are seen on allograft surface. Inner portion of this implant did not change before and after complete weight bearing. After fracture, no rapid hypertrophy of fibula occurred. All these were considered signs of failure of transplanted fibula vascularity.