原发性胸腺癌是一种较少见的高侵袭性恶性纵隔肿瘤,约占胸腺肿瘤的9.4%~36.3%[1],其病因至今未明确。北京协和医院1994年至2004年手术治疗胸腺肿瘤264例,病理证实的胸腺癌共29例,约占同期手术的11.0%[2]。由于发病率低,因此胸腺癌的临床特点和治疗模式尚未完全建立。为了提高对 Primary thymus cancer is a rare high-invasive malignant mediastinal tumor, accounting for 9.4% to 36.3% of thymoma [1], the etiology has not yet been defined. 264 cases of thymus tumors were treated by Beijing Union Medical College Hospital from 1994 to 2004, and 29 cases of thymus carcinoma were confirmed by pathology, accounting for 11.0% of the total surgeries in the same period [2]. Because of the low incidence, the clinical features and treatment modalities of thymic carcinoma have not yet been fully established. In order to improve on