Which of the following condition is considered as a premalignant condition for secondary osteosarcoma?: (A) Paget's disease, (B) Enchondromatosis, (C) Diaphyseal aclasis, (D) All of the above
Answer is D. Pre-malignant bone lesions of secondary osteosarcoma : Paget's disease Diaphyseal aclasis Enchondromatosis Post-radiation Fibrous dysplasia Reference: Maheshwari; Essential Ohopaedics 9th ed; Page no: 242