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(A,B) At time of diagnosis, CT scan showed a well-defined osteolytic lesion of the head and neck of the left femur with integrity of cortical bone. (C–E) During the follow up, for the occurrence of a pathological fracture, CT scan showed a large, complex area of osteostructural alteration of the neck and femoral shaft composed of solid vascularised tissue widely extended in perifemural tissue.
