Osteosarcoma can develop in:: (A) Osteoid osteoma, (B) Osteoblastoma, (C) Paget's disease, (D) All of the above
Answer is C. Ans: c (Paget's disease) Ref: Maheswari, 4th ed,p. 221Osteosarcoma can develop secondary to premalignant diseases of the bone.They are usually less malignant & seen in the older age group.Premalignant lesions are:* Paget's disease* Diaphyseal aclasis* Enchondromatosis* Post radiation