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: Medicine
[{'content': 'Impoant chemotherapy agent used for the thymoma treatment is: \nSelect and explain. \nA. Cisplatin, B. 5-FU, C. Doxorubicin, D. Methotrexate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Treatment of thymoma Encapsulated tumors and stage I disease, complete resection is curative. Stage II disease, complete resection may be followed by 30-60 Gy of postoperative radiation therapy Stage III and IV disease, the use of neoadjuvant chemotherapy followed by radical surgery, with or without additional radiation therapy + additional consolidation chemotherapy Most effective chemotherapy regimens includes- a platinum compound (either cisplatin or carboplatin) and an anthracycline. Addition of cyclophosphamide, vincristine, and prednisone improves response rates. Ref: Harrison, E-18, chapter e-20', 'role': 'assistant'}]