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
Most common tumor of middle mediastinum: 
Select and explain. 
A. Pericardial cyst, B. Aneurysm, C. Mesenchymal tumors, D. Lymphoma
D: Lymphoma
Answer: D: Lymphoma 
Explanation: MC common tumor of Middle Mediastinum: Lymphoma.
MC common mass of Middle Mediastinum: Brachogenic cyst***.