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: Surgery
An evidence that splenectomy might benefit a patient with idiopathic thrombocytopenic purpura includes which of the following: 
Select and explain. 
A. A significant enlargement of the spleen, B. A high reticulocyte count, C. Patients age less than five years, D. An increase in platelet count on corticosteroid therapy
D: An increase in platelet count on corticosteroid therapy
Answer: D: An increase in platelet count on corticosteroid therapy 
Explanation: None