<prompt> Most common site of Ewings sarcoma ?Upper end of tibiaShaft of tibiaLower end of femurShaft of femur  <response>: Ans. is d i.e., Shaft of femur Commonest site Ivory osteoma - Frontal sinus Osteoid osteoma - Tibia Admantinoma Ameloblastoma - Mandible Chordoma - Sacrum and cervical spine Osteoclastoma - Lower end of femur Ewings sarcoma - Femur diaphysis tibia diaphysis Osteosarcoma - Distal femur 45, Proximal tibia 25 Simple bone cyst - Proximal humerus Aneurysmal bone cyst - Bones around knee Femur, tibia Osteochondroma - Bones around knee distal femur proximal tibia Fibrous dysplasia - Proximal femur Tibia Enchondroma - Phalanges of hand Multiple myeloma - Veebrae Metastasis - Veebrae 