Orthopaedics A 30 yrs. man with radio dense mass around elbow, with a clear zone between the mass and humerus. What is the probable diagnosis? A Paraosteal osteosarcoma B Periosteal osteosarcoma C Myositis ossificans D Tumour calcinosis. 💡 Explanation A 30 yrs. man with radio dense mass around elbow, with a clear zone between the mass and humerus. What is the probable diagnosis? ✓ Correct Answer: A. Paraosteal osteosarcoma