患者　男 ,5 3岁 ,因进行性吞咽困难 2个月入院。临床体检无阳性体征 ,实验室检查未见异常。CT表现 :后纵隔主动脉弓以下至左心房中部层面见一巨大软组织肿块影。最大位于隆突下层面 ,9cm× 6cm大小 ,边缘不清楚 ,气管隆突及心影向前推移 ,降主动脉及食管受压向左后方移位 ,肿? Patient Male, 53 years old, admitted to hospital for 2 months due to progressive dysphagia. Clinical examination no positive signs, no abnormal laboratory tests. CT findings: Posterior mediastinum aortic arch below the middle of the left atrium to see a huge soft tissue mass. The largest located in the lower surface of the carina, 9cm × 6cm size, the edge is not clear, tracheal carina and heart shadow forward, the descending aorta and esophageal pressure to the left rear shift, swollen?