患者，男，24岁，因咳嗽10天、气促3天人院。查体：右胸上部叩诊实音，右肺呼吸音弱，两侧睾无异常。胸片、CT及MR均尔右前纵隔占位性病变。以右前纵隔肿瘤作剖胸探查，术中见：肿瘤为实性分叶状，无完整包膜，侵及右上、中肺叶，约20X30X35cm’大小，仅取活检报告为：“恶性化 The patient, male, 24 years old, was hospitalized for 10 days for cough and 3 days for shortness of breath. Physical examination: The real chest sounds in the right upper chest, the right lung breath sounds are weak, and there is no abnormality in the bilateral testes. Chest radiographs, CT, and MR were all right frontal mediastinal lesions. The right anterior mediastinal tumor was used as a transthoracic exploration. During the operation, the tumor was solid lobulated, without complete capsule, and invading the right upper and middle lobe, about 20X30X35cm’ in size. Only the biopsy report was: “Malignation