<prompt> Sunray appearance on x-rays is suggestive of :ChondrosarcomaMetastatic tumor in the boneOsteogenic sarcomaEwings sarcoma  <response>: Osteosarcoma - New bone is laid down along the blood vessels within the tumor growing centrifugally giving rise to a Sun -ray appearance on x -ray. Chondrosarcoma- Speckled calcification on x-ray Ewings sarcoma - Second most common malignant. Classic x-ray appearance is the onion skin 