<prompt> Impoant chemotherapy agent used for the thymoma treatment is:Cisplatin5-FUDoxorubicinMethotrexate  <response>: 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 