支气管充气征:CT诊断早期周围型肺癌(直径≤2cm)特征性征象

Air bronchogram: A reliable sign in peripheral lung cancer(diameter≤2 cm) by CT diagnosis

目的:探讨CT支气管充气征在早期周围型肺癌(直径≤2cm)诊断中的价值。方法:回顾性分析75例患者,共有95个直径≤2cm的结节(恶性75个,良性20个),采用薄层CT与病理诊断对照研究这95个结节。结果:薄层CT显示,恶性结节内有支气管充气征20个(26.7%),见于肺泡癌、腺癌及鳞癌。但肺泡癌与腺癌的恶性结节中,有支气管充气征的结节明显高于鳞癌来源的恶性结节,差异具有显著性意义(P<0.05)。结论:周围小结节中出现支气管充气征是早期周围型肺癌的一个较为肯定的征象;支气管充气征对早期周围型肺癌的组织学类型有提示作用。

Objective： To investigate the diagnosis value of air bronchogram judged by CT（computer- ized tomography） in early peripheral lung cancer （diameter≤2 cm）. Methods： Comparing the diagnosis results of thin section CT with that of pathology, 95 nodules （75 malignant nodules and 20 benign nodules） in 75 patients were studied by retrospective analysis. Results： The results of thin section CT showed that air bronchogram was detected in 20 malignant nodules which total number were 75. The malignant nodules with air bronchogram were detected only in alveolar carcinoma, adenocarcinoma and squamous carcinoma, and there were much more nodules with air bronchogram in alveolar carcinoma and adenocarcinoma than that in squamous carcinoma, the differences were significant. Conclusion： That peripheral small nodule with air bronchogram is a significant sign of early peripheral lung cancer, which could give us tips to judge the histologic types of early peripheral lung cancer.