This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Marker for granulocytic Sarcoma- 
Select and explain. 
A. CD33, B. CD38, C. CD117, D. CD137
C: CD117
Answer: C: CD117 
Explanation: Answer is option 3,CD117 kit, a proto-oncogene, encodes the transmembrane tyrosine kinase receptor CD117 and is detected by flow cytometry in the majority of cases of acute myeloid leukemia. The prognostic significance of the presence of c-Kit in acute myeloid leukemia is debated. Granulocytic sarcoma is a primary or secondary manifestation of acute myeloid leukemia. www.archivesofpathology.org