Abstract
Out of 27 operated patients with thymoma, 19 had invasive thymoma of the Stage II, III on IV according to Masaoka's classifications. Total resection of the thymus and adjacent tissues was performed in 25 patients and subtotal resection or bypass operation in two. Nineteen patients with invasive thymoma underwent postoperative radiation therapy. All patients who underwent total resection of thymoma are still alive to date, supporting the necessity of total resection in achieving a good prognosis in the surgical treatment of thymoma. Chemotherapy and additional inradiation are necessary for patients in whom total resection of the thymoma is impossible due to pleural dissemination or extensive invasion to the great vessels.
