One hundred and ten cases of thymic tumors were intervened surgically

including 92 thymoma

8 thymic carcinoid

and 10 thymic carcinoma. In this series

50. 9% of the cases were complieated with various syndromes

44. 5 % with myasthenia gravis （MG）. Resection rate was correlated with the size and invasion of the tumor. There was significant difference in resection rate among thymoma

thymic carcinoid and thymic carcinoma. The degree of invasion undoubtely influenced on resection. The 3 -

5- and 10- year suvival rate of the thymoma were 82. 7 %

68. 1% and 40. 0 %

respectively. The prognosis depended on the pathological classification and the severity of the neighbouring invasion

but MG had no significant effect on prognosis. Recurrence and metastasis of the tumor were the main cause of late death.