原发性肺癌并发脑转移,若在肺癌确诊后于治疗期间出现头痛、呕吐、视乳头水肿等颅内高压症状及脑局部功能受损时,诊断当无困难。但在早期肺癌症状不典型或在肺癌未确诊前,以颅内高压或颅神经受损为首发症 Primary lung cancer complicated by brain metastases, if diagnosed after lung cancer in the treatment of headache, vomiting, papilledema and other symptoms of intracranial hypertension and impaired brain function, the diagnosis without difficulty. However, atypical early symptoms of lung cancer or lung cancer is not diagnosed prior to the intracranial hypertension or cranial nerve damage as the first disease