以神经肌肉综合征为突出表现的肺癌,无呼吸道症状和肺部体征的往往造成误诊,现就本人所遇三例报告如下。例1:段某,男,56岁。因腰痛和双下肢无力2月于1981年1月入院。2月前劳累后腰痛和下肢乏力,逐渐加重,服消炎痛可暂时缓解。无咳嗽和咯血。平素健康,吸烟每天10支,共36年。检查:心肺未见异常,肝脾未及,脊柱活动稍受限,双下肢肌力Ⅳ级。二次胸片正常。诊断:腰肌劳损,神经痛,癔病。住院3月对症治疗病情无好转,再次胸片无异常发现。病人消瘦,焦虑不安,易发怒,护扶行走难。1981年7月转院就诊过程中死亡。尸解确诊为右上肺癌。例2:王某,男,47岁,农民。因右上肢麻木无力门诊以低钾症收住院,入院前2月原因不明的开始感右上肢软,痛,麻木,逐渐加重至右手不能用筷进 Neuromuscular syndrome is a prominent manifestation of lung cancer, no respiratory symptoms and lung signs are often misdiagnosed, I now encounter three cases reported as follows. Example 1: Duan a, male, 56 years old. Due to low back pain and weakness in both lower extremities February was admitted to hospital in January 1981. 2 months ago tired back low back pain and lower extremity fatigue, and gradually increased, anti-inflammatory pain can temporarily ease. No cough and hemoptysis. Usually healthy, smoking 10 per day, a total of 36 years. Check: no abnormal heart and lung, liver and spleen and spine, slightly limited spine activity, lower limb muscle strength Ⅳ. Secondary chest normal. Diagnosis: lumbar muscle strain, neuralgia, hysteria. Hospitalization March symptomatic treatment of no improvement, again no abnormal chest X-ray findings. Patients weight loss, anxiety, irritability, care walking difficult. 1981 July transfer to hospital for treatment died. An autopsy diagnosed as right upper lung cancer. Example 2: Wang, male, 47 years old, farmer. Due to weakness in the upper right upper extremity numbness outpatient admitted to hospital for hypokalemia, admitted to the beginning of February unknown cause of the right upper limb soft, pain, numbness, and gradually increased to the right hand can not be chopsticks into