This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
9 year old child, fever with pain and swelling in midthigh, lamellated appearance and codman triangle, small round cell tumor positive for mic2 
Select and explain. 
A. Osteosarcoma, B. Osteomyelitis, C. Ewing's sarcoma, D. Mutiple myeloma
C: Ewing's sarcoma
Answer: C: Ewing's sarcoma 
Explanation: None