纵隔型肺癌的CT表现：可清楚显示肿块的大小，形态，边缘。受累支气管的情况，肿块周围的情况。
CT could well show the size, shape and margin of the mass, the involvement of the bronchial lumen and also the pulmonary background around the lesion.
结论经电子支气管镜肺活检术并发症少、安全可行，对周围型肺癌具有较高的诊断价值。
Conclusion it is of important diagnostic value to use electronic bronchoscope to carry out lung biopsy for the diagnosis of peripheral lung cancer, which is safe and feasible, with few complication.
目的：了解经支气管肺活检（TBLB）对疑为周围型肺癌的肺部孤立性肿块的诊断作用。
Objective: To evaluate the diagnostic value of TBLB in peripheral pulmonary nodule that was not defined.
结论：支气管肺癌，无论是中央型还是周围型，均由支气管动脉和肺动脉双重供血，其中支气管动脉为主要供血动脉；
Conclusion: Lung cancers, whether peripheral or central types, are supplied by both of bronchial artery and pulmonary artery; The bronchial artery is the main blood supplying one;
结论经支气管镜肺活检检查是确诊周围型肺癌的重要手段之一，联合应用多种取材方法和技术可提高周围型肺癌的诊断准确率。
Conclusion Transbronchial lung biopsy is an important method in diagnosing of peripheral lung cancer. Combination of TBLB can increase the diagnostic positive rate of peripheral lung cancer.
结论经支气管镜肺活检检查是确诊周围型肺癌的重要手段之一，联合应用多种取材方法和技术可提高周围型肺癌的诊断准确率。
Conclusion Transbronchial lung biopsy is an important method in diagnosing of peripheral lung cancer. Combination of TBLB can increase the diagnostic positive rate of peripheral lung cancer.
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