目前,经纤维支气管镜肺活检已广泛开展,并取得较满意的效果。支气管内肿瘤的钳夹活检已是常规检查方法,然而小细胞肺癌的支气管内膜的活检标本常因人为挤压而影响诊断的正确性,支气管粘膜下生长的或支气管壁外的肿瘤往往活检标本不理想,当刷检和冲洗液的细胞学检查不能诊断时,常导致纤支镜检查失败。本文报道3例阻塞性支气管肿瘤活检标本均不能确诊,经纤支镜针吸活检最后确立诊断。现报告如下: At present, bronchoscopic lung biopsy has been widely carried out and achieved satisfactory results. Clamp biopsy of intrabronchial tumors is a routine examination method. However, the endobronchial biopsy specimens of small cell lung cancer often affect the accuracy of diagnosis due to artificial extrusion, bronchial submucosal growth or bronchial wall tumors are often biopsy specimens. Unsatisfactory, when the cytology of the brushing and rinsing fluid cannot be diagnosed, it often leads to failure of bronchoscopy. This article reported that 3 cases of obstructive bronchial tumor biopsy specimens can not be diagnosed, and the final diagnosis was confirmed by bronchoscopic needle biopsy. The report is as follows: