肿瘤的转移是指肿瘤细胞从原发部位侵入淋巴管、血管或体腔，转移到别的部位或器官后继续生长，形成与原发肿瘤相同类型肿瘤的复杂而有序的过程。肿瘤的浸润和转移是肿瘤术后复发和放、化疗失败的主要原因，也是肿瘤患者治愈率得不到提高的主要影响因素。实体瘤在发生、发展及 Tumor metastasis refers to the intricate and orderly process of tumour cells that invade the lymphatic vessels, blood vessels or body cavities from the primary site, and then continue to grow after they have been transferred to other sites or organs to form the same type of tumour as the primary tumour. Tumor infiltration and metastasis are the main reasons for postoperative recurrence and failure of radiotherapy and chemotherapy, and they are also the main influencing factors for failure to improve the cure rate of cancer patients. The occurrence and development of solid tumors