1　病例介绍男性　28岁。主诉右胸闷痛半年。于1998-04-09收住院。查体:右下肺呼吸音低,叩诊心界向右侧扩大。余无异常。X线表现:右前下纵隔巨大包块,上窄下宽,向右侧肺野凸出,近膈上平面超过右侧锁骨中线。外缘清晰,内缘与右心缘重叠。侧位包块位于前下纵隔,与心影相重,前缘达 1 case description Male 28 years old. Chief complaint of chest pain half a year. In 1998-04-09 admitted to hospital. Physical examination: lower right lung breath sounds low, percussion heart widened to the right. I no exception. X-ray findings: right anterior mediastinal mass huge mass, narrow on the narrow, to the right lung field bulge, near the diaphragm on the plane beyond the right clavicular midline. The outer edge is clear, the inner edge overlaps with the right heart edge. Lateral mass in the anterior mediastinum, and heart shadow relative weight, up to the front edge