周围型肺癌在肺部球形病灶的鉴别诊断中是一个比较困难的问题。近年来国外偏重于肺穿刺活检诊断;但是,肺穿刺活检仅能适用于比较外围的病变,而且气胸的并发症高达25～50％,死亡率为0.1％。对于周围型肺癌的X线检查,较有意义的是高千伏摄影和体层摄影。本文报告260例表现为球形肿块 Peripheral lung cancer is a difficult problem in the differential diagnosis of spherical lesions in the lung. In recent years, foreign emphasis on the diagnosis of pulmonary biopsy; However, lung biopsy can only be applied to the peripheral lesions, and the complications of pneumothorax as high as 25 to 50%, the mortality rate of 0.1%. For X-ray examination of peripheral lung cancer, the more significant is the high-kV photography and tomography. This article reports 260 cases of spherical masses