原发性肺癌临床表现多种多样，其肺部表现本身的表现易被慢性呼吸道疾病的症状和体征掩盖，而肺外表现为首发症状的则更易漏诊或误诊。笔者自1989年9月至1999年8月遇到以肺外表现为首发症状的肺癌25例，现报告如下：1．临床资料1．1一般资料本组25例，男20例，女5例。年龄29岁 The clinical manifestations of primary lung cancer are various. The manifestations of the pulmonary manifestations are easily obscured by the symptoms and signs of chronic respiratory diseases, while those with extrapulmonary symptoms that are the first symptoms are more likely to be missed or misdiagnosed. From September 1989 to August 1999, the author encountered 25 cases of lung cancer with extrapulmonary manifestations as the first symptom. The present report is as follows: 1. Clinical data 1.1 General information The group of 25 patients, 20 males and 5 females. Age 29 years old