This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
MIC-2 is a marker of? - 
Select and explain. 
A. Ewing sarcoma, B. Chronic lymphocytic leukemia, C. Mantle cell lymphoma, D. All of these
A: Ewing sarcoma
Answer: A: Ewing sarcoma 
Explanation: Harshmohan textbook of pathology 7th edition In Ewings sarcoma - the cell surface marker by the tumor cells of ES / PNET group is CD99 which is a product of MIC2 gene located on X and Y chromosome. .