患者，男，61岁。因胸闷伴进食梗噎感2周，于1996年9月4日入院。查体：一般情况可，浅表淋巴结未触及，胸廓左右对称，左肺呼吸运动减低，语颤减弱且可闻及散在湿性罗音。X线胸片示：双肺纹理清晰，左肺门可见边缘光滑密度均匀之巨大团块影，直径9cm×6cm，肿块内侧缘与纵隔相 Patient, male, 61 years old. He was admitted to hospital on September 4, 1996 due to chest tightness and eating stench for 2 weeks. Physical examination: In normal circumstances, the superficial lymph nodes are not touched, the thorax is symmetrical, the left lung’s respiratory motion is reduced, and the speech trembling weakens and can be heard and scattered in wet rales. X-ray showed: the texture of the two lungs is clear, and the left hepatic portal shows a huge mass with smooth edges and uniform density. The diameter is 9cm×6cm. The medial edge of the tumor and the mediastinum