This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
The most common site of enlargement of the lymph nodes in Hodgkin's lymphoma is 
Select and explain. 
A. Cervical, B. Axillary, C. Mediastinal, D. Abdominal
C: Mediastinal
Answer: C: Mediastinal 
Explanation: In about 50% of patients who have both Hodgkin's and non-Hodgkin's lymphoma, the mediastinum may be the primary site." Ref : Schwaz 9/e p575