Fig. 2

Case of a 75-year-old female patient with a Ewing-like sarcoma of the right distal femur with infiltration of the joint space. A Conventional radiography showing the osteolytic lesion. B Magnetic resonance imaging with contrast agent shows erosion of the articular cortex of the medial femur condyle. C Intraoperative photograph after extra-articular knee resection and implantation of a megaimplant. The patella was split in the coronal plane. D Resected knee (top: medial, left: proximal) with the articular part of the patella (*) and the biopsy scar (+) attached to it. E Postoperative antero-posterior radiograph