Formation dynamics of lymph node metastases after heterografting of Ehrlich ascites tumor cells in rats.

The inoculation of 100 X 10(6) Ehrlich ascites tumor cells into the peritoneal cavity of X-irradiated rats induced a transitory ascites tumor and lymph nodes metastases. The sequential aspects of metastases formation and regression were studied. No metastases were found in non-irradiated rats injected with the same amount of tumor cells.