原发性肺癌的临床表现常见为干咳、气短、咯血及胸痛。部分肺癌患者仅有伴癌综合征表现,而仅以伴癌综合征为首发症状就诊的原发性肺癌患者极易造成误诊。现报告以腹泻为首发症状的原发性肺癌误诊2例,就误诊原因进行分析。 The clinical manifestations of primary lung cancer common dry cough, shortness of breath, hemoptysis and chest pain. Some patients with lung cancer only with the performance of cancer syndrome, and only the first symptom associated with cancer syndrome patients with primary lung cancer can easily lead to misdiagnosis. It is reported that diarrhea as the first symptom of primary lung cancer misdiagnosis in 2 cases, the reasons for misdiagnosis.