<prompt> 7 years old child presents with a lesion in upper tibia. X ray shows radioluscent area with Codmans triangle and Sunray appearance. Diagnosis isEwing sarcomaOsteosarcomaOsteoid OsteomaChondrosarcoma  <response>: Sunray sunburst appearance and Codmans triangle typical freatures of Osteosarcoma may also be seen in Ewings sarcoma, osteomyelitis onion peel apperacne typical feature of Ewings sarcoma May also be seen in Osteosarcoma, and osteomyelitis Refer Maheshwari 9the p 240. 