患者男，３５岁。咳嗽、咳痰、胸闷、哮喘１６个月入院。查体无阳性体征。ＣＴ平扫于前上纵隔可见一软组织肿块影，形态不规则，肿块内可见点状钙化。肿块与上腔静脉，主动脉弓及升主动脉间的脂肪间隙消失。肿块左侧可见一圆形小肿块影，主动脉弓旁、气管前、腔静脉后方有... Male patient, 35 years old. Cough, cough, chest tightness, and asthma were admitted to the hospital 16 months later. There are no positive signs for physical examination. CT scan showed a soft tissue mass on the anterior superior mediastinum. The appearance was irregular and calcification was seen in the mass. The fat space between the lump and the superior vena cava, the aortic arch and the ascending aorta disappeared. The left side of the mass can be seen as a small round lump. The aortic arch, anterior trachea, and posterior vena cava are...