例1　男,58岁,因间歇头痛1月伴呕吐3天行头部ＣＴ检查,发现颅内占位病变,行脑瘤切除术,术后病理报告为恶性组织,转移癌可能性大;全身检查未找到原发灶。开颅术后1月余患者出现胸闷症状,胸部Ｘ线检查发现右肺上叶后段一0.3ｃｍ×0.5ｃｍ肿物,行右肺上叶切除术,病理报告为细支气 Example 1 Male, 58 years old, had a head CT scan for 3 days with intermittent headache and vomiting for 1 month. He found intracranial lesions and underwent brain tumor resection. The postoperative pathology report was malignant and metastatic cancer was highly likely; Inspection did not find the primary lesion. More than one month after craniotomy, the patient developed chest tightness symptoms. A chest X-ray examination revealed a 0.3 cm x 0.5 cm mass in the posterior segment of the right upper lobe. Right upper lobe resection was performed. The pathology report was fine qi.