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What is An 8-year-old boy presents with a gradually progressing swelling and pain since 6 months over the upper tibia. On x-ray, there is a lytic lesion with sclerotic margins in the upper tibial metaphysis. The diagnosis is - and explain in detail?
Lytic lesion with sclerotic margin in upper end of tibia in an 8-year-old by suggests the diagnosis of Brodie's abscess (among the given options).
Lytic lesions with sclerotic margins is seen in : -

i) Simple bone cyst                        
ii) Brodie's abscess  
iii) Osteoblastoma         
iv) Chondroblastoma