The Radiological hallmark of Osteo SA-: (A) Soap bubble appearance, (B) Sun ray appearance, (C) Osteoid formation by neoplastic cells, (D) Cotton wool appearance
Answer is B. Ans. is 'b' i.e. sunray appearance .X-ray features of Osteosarcoma.Area of irregular destruction of metaphysesErosion of the overlying cortex.New bone formation in the matrix of the tumor*Periosteal reaction* (which is irregular; periosteal reaction in osteomyelitis is smooth)Codman's triangle*Sun-ray appearance*