Secondary osteosarcoma are associated with -: (A) Paget's disease, (B) Osteogenesis imperfecta, (C) Melhoreostosis, (D) Ankylosing spondylitis
Answer is A. Ans. is 'a' i.e., Paget's disease Causes of secondary osteosarcomao Pagets Diseaseo Fibrous dysplasiao Radiationo Enchondromatosiso Hereditary multiple exostosiso Chronic osteomyelitiso Bone infarction