<prompt> 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 -Osteogenic sarcomaOsteoclastomaBrodies abscessEwings sarcoma  <response>: Lytic lesion with sclerotic margin in upper end of tibia in an 8-year-old by suggests the diagnosis of Brodies abscess among the given options.Lytic lesions with sclerotic margins is seen in : -i Simple bone cyst ii Brodies abscess iii Osteoblastoma iv Chondroblastoma 