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(a) X-ray anteroposterior and lateral views of proximal tibia and knee joint showing diaphyseal osteosarcoma of tibia with sclerosis (arrow), cortical destruction on posteromedial side (arrow heads) and new bone formation in the soft tissues (b) x-ray distal end of femur (anteroposterior and lateral views) showing sclerosis/radio-opacity in sclerosing osteosarcoma
