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
[{'content': 'A testicular tumor in a man aged 60 years is ; most likely to be: \nSelect and explain. \nA. Germ cell tumor, B. Seoli cell tumor, C. Teratocarcinoma, D. Lymphoma', 'role': 'user'}, {'content': "Answer: D \nExplanation: A testicular mass in a male > 50 yrs should be regarded as lymphoma until proven otherwise. Ref: Harrison's Internal Medicine, 18th Edition, Page 806; Bailey and Love's Sho Practice of Surgery, 23rd Edition, Page 1278.", 'role': 'assistant'}]