呼吸系最常见的恶性肿瘤是肺癌,诊断一般比较容易,但也有少数是困难的。我院从1977～1986年,有45例原发性肺癌被误诊,后经细胞学和组织学证实。本文试图总结一些经验教训。临床资料1 一般情况:男34例,女11例,年龄最大者80岁,最小38岁,平均61岁。误诊时间最长1年半,最短40d,平均60.5d。2 症状和体征:咳嗽34例(75.6± The most common malignancy in the respiratory system is lung cancer. Diagnosis is generally easier, but a few are difficult. In our hospital from 1977 to 1986, 45 cases of primary lung cancer were misdiagnosed and confirmed by cytology and histology. This article attempts to summarize some lessons learned. Clinical data 1 General conditions: 34 males and 11 females, the oldest 80 years old, the youngest 38 years old, an average of 61 years old. The misdiagnosis time is up to one and a half years, the shortest 40d, an average of 60.5d. 2 Symptoms and signs: cough in 34 cases (75.6±)