Man 19 yo, pain and swelling at distal right femur one month ago (see photo).
Ultrasound examination this thigh with linear and convex probe showed the mass was fro periosteum extending to muscle and destruction the bone like sunray image.
Front and lateral X-ray films this mass were not clear, but MSCT revealed the mass being from periosteum and erosion the cortex of the femur bone with periosteal reaction both 2 sides.
Biopsy was done, microscopic report was DISTAL FEMUR TUMOR. Report of biopsy of this tumor is OSTEOSARCOMA. THE TREATMENT CHOICE IS AMPUTATION THE LEG OR REGIONAL CHEMOTHERAPY.