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目的：讨论分析胸膜凹陷征形成的因素。方法：本组搜集了１９９１ 年１１ 月～１９９７ 年１１ 月间周围性肺癌１０５ 例，男７８ 例，女２７ 例。年龄２４～８０ 岁，平均年龄５９ 岁。其中鳞癌４１ 例，腺癌３８例，小细胞肺癌（ＳＣＬＣ）２３ 例，肺泡癌３ 例。通过统计学方法对此组肺癌的ＣＴ表现进行分析。结果与结论：胸膜凹陷征与肿块到胸壁的距离有关，距离越近，越易发生胸膜凹陷征；胸膜凹陷征与肿瘤远端是否有肺不张有关，有肺不张的肿瘤易产生胸膜凹陷征；胸膜凹陷征与肺癌的组织类型无关；胸膜凹陷征与肿块的大小无关；胸膜凹陷征与患者的性别及年龄无关。周围型肺癌远端的肺不张是其产生胸膜凹陷征的内在动力之一，而肿瘤边缘到胸壁的距离是胸膜凹陷征形成的主要外部因素
Objective: To discuss and analyze the factors of pleural indentation. Methods: The group collected from November 1991 to November 1997 105 cases of peripheral lung cancer, 78 males and 27 females. Age 24 to 80 years old, average age 59 years old. There were 41 cases of squamous cell carcinoma, 38 cases of adenocarcinoma, 23 cases of small cell lung cancer (SCLC) and 3 cases of alveolar carcinoma. The CT findings of this group of lung cancer were analyzed statistically. RESULTS AND CONCLUSION: The pleural indentation was related to the distance from the tumor to the chest wall. The closer the distance, the more prone to pleural indentation. The pleural indentation was related to whether the distal end of the tumor had atelectasis, and the pleural recess was easily found in the tumor with atelectasis Sign; Pleural indentation has nothing to do with the type of lung cancer tissue; pleural indentation and tumor size has nothing to do; pleural indentation and the patient’s gender and age has nothing to do. Pulmonary atelectasis distal to the peripheral lung cancer is one of the intrinsic motivation to produce pleural indentation, and the distance from the tumor edge to the chest wall is the main external factor in the formation of pleural indentation