The effect of ligation of portal branch on the growth of implanted tumor of the liver in rats.

Small masses of Walker 2 56 carcinosarcoma were implanted into the liver lobe of wistar rats. And at same time, a branch of the portal vein of the involved liver lobe was ligated. After 18 days, the growth of implanted tumor in ligation group was much slower than that in control group, namely, the diameter and wet weight of implanted tumor in ligation group were much smaller and lighter than those in control group. Furthermore, there were no ascites and lung metastases in ligation group. These results suggested that simple ligation of portal branch could apparently inhibit the growth and development of implanted tumor in the liver.