911例次经纤支镜活检材料,诊断为肺癌的267例,检出阳性率为30%。267例肺癌皆属中央型;其中鳞癌最为多见,占143例,余依次为腺癌,小细胞癌和大细胞癌,有2例不能分类。911例次活检材料中26例分别误诊为假阳性和假阴性,总的误诊率为2.85%。文中分析了影响纤支镜检出阳性率的各种因素,对纤支镜活检材料的形态特征作了较充分的描述。 Among 911 patients who underwent bronchoscopic biopsy, 267 patients with lung cancer were diagnosed with a positive rate of 30%. Among the 267 lung cancer cases, the most common were squamous cell carcinomas, accounting for 143 cases, followed by adenocarcinomas, small cell carcinomas, and large cell carcinomas. Two cases were not classified. Twenty-six cases of 911 biopsy materials were misdiagnosed as false positives and false negatives respectively. The total misdiagnosis rate was 2.85%. In this paper, various factors affecting the positive rate of bronchoscopy were analyzed, and the morphological characteristics of bronchoscopic biopsy materials were fully described.