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
Which of the following is the MOST common primary malignant tumor of spleen? 
Select and explain. 
A. Angiosarcoma, B. Hamatoma, C. Secondaries, D. Lymphoma
A: Angiosarcoma
Answer: A: Angiosarcoma 
Explanation: Primary neoplasm of spleen is a rare entity. Most common primary neoplasm of spleen is hemangioma and most common primary malignant tumor is angiosarcoma. Remember: Most common neoplasm of spleen is lymphoma Most common primary tumor of spleen is Hemangioma Most common primary malignant tumor of spleen is Hemangiosarcoma (or angiosarcoma) Ref: Sabiston 17/e, Page 1689; Maingot's 11/e, Page 1085; Bailey & Love 24/e, Page 1091