[Thymoma with long-term survival treated by polysurgery; report of a case].

A 50-year-old man was found to have a chest abnormal shadow during a check-up and visited our hospital in 1991. Tumor shadow was observed in the anterior mediastinum. Resection of the tumor was performed by partial thymectomy. The pathological diagnosis was a thymoma type B1 and stage I based on Masaoka' s classification. In 2004, he underwent radical thymectomy and partial resection of the lung to remove the local recurrent tumor followed by postoperative radiation therapy. In 2006, 3rd operation was performed and the tumor in the superior mediastinum was resected. Since then, the patient is well without signs of recurrence. We experienced a case of thymoma with long-term survival treated by polysurgery.