肺癌,特别是中心型肺癌的早期诊断和X线平片阴性肺癌的定位诊断,主要依靠纤维支气管镜检查(下称纤支镜检)。通过纤支镜检可钳取活组织,刷取脱落细胞,即使镜下肉眼观察对判定病理类型亦颇有帮助。一、肺癌纤支镜下的表现:据统计,约3/4的肺癌发生在段支气管以上,均在纤支镜检的直视范 Lung cancer, especially the early diagnosis of central lung cancer and the diagnosis of X-ray negative lung cancer, mainly rely on fiberoptic bronchoscopy (hereinafter referred to as bronchoscopy). The fibrobronchoscope can be used to clamp off the living tissue and remove the exfoliated cells. Even microscopic observation can help determine the pathological type. First, the performance of lung cancer under the bronchoscope: According to statistics, about 3/4 of lung cancer occurs above the segmental bronchus, both in the direct view of the fibrobronchoscopy