This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Myelogenous Leukemia, Subject name: Pathology
A 50 years old male presents with massive splenomegaly. His differential diagnosis will include all, except: 
Select and explain. 
A. Chronic myeloid leukemia, B. Polycythemia rubra vera, C. Hairy cell leukemia, D. Aplastic anemia
D: Aplastic anemia
Answer: D: Aplastic anemia 
Explanation: Diseases Associated with Massive Splenomegaly Chronic myelogenous leukemia Gaucher's disease Lymphomas Chronic lymphocytic leukemia Hairy cell leukemia Sarcoidosis Myelofibrosis with myeloid metaplasia Autoimmune hemolytic anemia Polycythemia vera Diffuse splenic hemangiomatosis