恶性肿瘤对宿主组织具有侵袭特性,从而形成浸润和转移。浸润是指恶性瘤细胞在生长过程中沿组织间隙移动,侵袭邻近组织或器官并继续生长。伸展出去的瘤组织与原发瘤相连者称为直接蔓延。转移是指恶性瘤细胞从原发瘤脱落后,通过各种途径抵达不相连续的部位,并继续生长形成新的同样性质的续发瘤。恶性肿瘤的扩散一词包括浸润与转移。转移必须先有浸润,它又是浸润的严重后果,两者密切相连。浸润和转移是个 Malignant tumors have invasive properties on the host tissue, resulting in infiltration and metastasis. Infiltration refers to the movement of malignant neoplastic cells along the interstitial space during growth, invading adjacent tissues or organs and continuing to grow. Stretched tumor tissue and primary tumors are called direct spread. Metastasis refers to the fact that malignant tumor cells, after detachment from the primary tumor, arrive at inconsecutive sites through various pathways and continue to grow to form new tumors of the same nature. The term malignant proliferation includes infiltration and metastasis. The transfer must first be immersed, and it is a serious consequence of infiltration. The two are closely linked. Infiltration and transfer is a