当前支气管肺癌(简称肺癌)是呼吸系统常见病,其早期症状不明显,且无特异性,故诊断较为困难。患者一旦出现呼吸系统症状、体征或/和X线表现,多属中、晚期,治疗困难,预后差。因此,早期发现肺癌极为重要。 1978年12月至1984年3月,我们对具有纤支镜检查临床指征,而X线胸部平片正常的门诊患者308例,作了纤支镜检查。经纤支镜定位及活检病理证实为肺癌者52例,并暂定为“X线平片阴性肺癌”,占同时期受检人数(2000例)的2.60％;占肺癌总数(524例)的 Current bronchogenic lung cancer (referred to as lung cancer) is a common respiratory disease, its early symptoms are not obvious, and no specificity, so the diagnosis is more difficult. Once the patient has respiratory symptoms, signs, or/and X-ray findings, it is mostly in the middle and late stages, and the treatment is difficult and the prognosis is poor. Therefore, early detection of lung cancer is extremely important. From December 1978 to March 1984, we performed fiberoptic bronchoscopy on 308 patients who had clinical indications for bronchoscopy and had normal X-ray chest radiographs. Pathologically confirmed by fiberoptic bronchoscopy and biopsy pathology confirmed 52 cases of lung cancer, tentatively designated as “X-ray negative lung cancer,” accounting for 2.60% of the total number of people examined (2000 cases) at the same time; accounting for the total number of lung cancer (524 cases)