癌细胞易从母生组织中分离,癌组织内细胞间连结松散,癌细胞的分离较正常组织细胞的分离更为简单。以恶性群体迅速生长为条件,肿瘤内部压力的增高,促使癌细胞向四周扩展与脱落。癌细胞阿米巴样活动、细胞体的变化、血流中的吸附作用以及血管壁的可能破坏,均促使肿瘤扩散。肿瘤细胞从淋巴道播散时,经胸导管进入血流,胸导管是恶性肿瘤细胞播散的重要通路,因肿瘤疾患死亡的病人,在胸导管的淋巴内有大量肿瘤细胞存在。不宜手术的病人,当切开胸导管时,淋巴液中常常发现肿瘤细胞。Burn的实验与临床证实,胸导管淋巴液内的肿 The cancer cells are easily isolated from the mother tissue, and the cells are loosely connected in the cancer tissue. The separation of cancer cells is more simple than the separation of normal tissue cells. With the rapid growth of malignant groups as a condition, the internal pressure of the tumor increases, prompting the cancer cells to expand and fall around. Cancerous ameba-like activity, changes in cell bodies, adsorption in the bloodstream, and possible destruction of the blood vessel walls all contribute to tumor proliferation. When tumor cells spread from the lymphatics, transthoracic ducts enter the bloodstream. The thoracic duct is an important pathway for the dissemination of malignant tumor cells. Because of the death of patients with tumor diseases, there are a large number of tumor cells in the lymphatics of the thoracic duct. In patients who are inoperable, when the thoracic duct is incised, tumor cells are often found in the lymph fluid. Burn’s experiment and clinical confirmation of thoracic duct lymphadenopathy