论文部分内容阅读
恶性肿瘤的转移是指肿瘤细胞从原发部位侵入淋巴管、血管或其他途径,被带到其它部位继续生长,形成与原发部位相同类型的肿瘤的过程,转移是恶性肿瘤的重要特征,所形成的肿瘤称为转移瘤或转移癌,肿瘤转移是绝大部分肿瘤患者死亡的最直接原因。1.恶性肿瘤转移发生的原因恶性肿瘤转移的发生与癌细胞的特性有关。癌细胞具有无限增殖、接触抑制现象丧失、癌细胞间粘着性减弱的特性是造成癌细胞易转移的主要原因。恶性肿瘤的转移受很多因素影响,包括肿瘤的原发
Malignant tumor metastasis refers to the invasion of tumor cells from the primary site lymphatic vessels, blood vessels or other means, was taken to other parts of the continued growth, the formation of the same type of tumor with the primary site of the process, the transfer of the important features of malignant tumors, The formation of the tumor called metastatic or metastatic cancer, tumor metastasis is the most direct cause of death of patients with cancer. 1. The causes of malignant tumor metastasis The occurrence of malignant tumor metastasis and the characteristics of cancer cells. Cancer cells with unlimited proliferation, loss of contact inhibition, adhesion between the weakening of cancer cells is the main reason for the easy transfer of cancer cells. Malignant tumor metastasis is affected by many factors, including the primary tumor