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.
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