本文报告5例首发神经系统症状的原发性肺癌,其中4例神经系统直接转移.1例为癌性周围神经病.肺外症状明显出现在原发灶症状之前.因此,提高对本病的认识,做到早期诊断,对改善预后有一定意义. This article reports 5 cases of primary lung cancer with first neurological symptoms, 4 cases of direct metastasis of the nervous system, 1 case of cancerous peripheral neuropathy. Extrapulmonary symptoms appear before the primary lesions. Therefore, to raise awareness of the disease , To achieve early diagnosis, there is a certain significance for improving the prognosis.