增殖失控及侵袭与转移是恶性肿瘤细胞的根本特性,也是夺去癌患者生命的根本原因。不单在癌症发展过程中可自发的发生广泛转移,而且在癌症常规诊疗过程中也有可能人为的促进癌细胞的转移(医源性转移),如诊疗操作中的种植及对患者免疫功能的损伤等。癌细胞转移是一个多步骤的复杂过程。然而,大量动物实验证明只要阻断转移过程中 Uncontrolled proliferation and invasion and metastasis are the fundamental characteristics of malignant tumor cells, and they are also the root cause of cancer patients’ death. Not only in the development of cancer can spontaneous metastasis occur widely, but also in the process of cancer diagnosis and treatment may also be artificially promote the transfer of cancer cells (iatrogenic transfer), such as planting in the operation and operation and damage to the patient’s immune function . Metastasis of cancer cells is a multi-step complex process. However, a large number of animal experiments have shown that