<prompt> Sunray appearance and Codmans triangle are radiological features of which of the following tumors?OsteosarcomaEwings SarcomaChondrosarcomaMultiple Myeloma  <response>: Ans. is a i.e., Osteosarcoma X-ray AppearanceTumourOnion Peel AppearanceEwings SarcomaSoap Bubble appearanceGCTCodmans TriangleOsteosarcomaSun Burst AppearanceOsteosarcomao Codmans triangle and sunray appearance are typical of osteosarcoma.o However, you should keep in your mind following very important facts: - Sunray sunburst appearance and codmans triangle indicates periosteal reaction periosteal new bone formation. Both these are typical of osteosarcoma but may also occur in other rapidly growing bone tumors Ewings sarcoma, and infection osteomyelitis. Similarly, onion peel appearance indicates periosteal new bone-formation and is typical for Ewings sarcoma. But this can also occur in oseosarcoma and osteomyelitis. The crux is that, aggresively growing tumors and infection stimulate the periosteum which then react by forming new bone, therefore it is called periosteal reaction which may take any of the above form.o Sun-ray sunburst appearance and Codmans triangle: - Typical features of osteosarcoma. May also be seen in Ewings sarcoma, osteomyelitis, o Onion-peel appearance Typical feature of Ewings sarcoma. May also be seen in osteosarcoma, and osteomyelitis 