肺癌是一种常见的恶性肿瘤,迄今 X 线检查仍为肺癌诊断的一种重要手段,在日常工作中我们感到 X 线检查时呈团块或结节表现的病例,重要的问题系假阳性,而其中主要的要排除球型肺炎,至于其它病例均迟早要进行外科治疗。但是,以炎症形式出现的肺癌却存在着假阴性的危硷。加上抗炎治疗有所好转的假象,容易使临床及 X 线工作者陷于盲目的乐观, Lung cancer is a common malignant tumor. X-ray examination is still an important method for the diagnosis of lung cancer so far. In our daily work, we feel cases of masses or nodules appearing on the X-ray examination. The important problems are false positives. The main one is to rule out spherical pneumonia. Surgical treatment should be performed sooner or later in other cases. However, there is a false-negative crisis in lung cancer that occurs in the form of inflammation. Together with the illusion that anti-inflammatory treatment has improved, it is easy for clinical and X-ray workers to be blindly optimistic.