This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal infections, Subject name: Anatomy
[{'content': "An 8-yr old boy presents witha gadually progessing swelling and pain since 6 months over the upper tibia. On X-ray there is alytic lesion with scleotic margins in the upper tibial metaphysis. The diagnosis is \nSelect and explain. \nA. Osteogenic carcinoma, B. Osteoclastoma, C. Brodie's abscess, D. Ewing's sarcoma", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lytic lesions with sclerotic margins in the upper end of tibia in an 8 yr old boy suggests the diagnosis of Brodie&;s abscess. lytic lesions with sclerotic margins are seen in: simple bone cyst brodie&;s abscess osteoblastoma chondroblastoma. ref : maheswari 9th ed', 'role': 'assistant'}]