[Studies on biological characterization of mammary tumours of the Sprague-Dawley-rat in the syngeneic tumour-host system. III. Metastatic experiments with primary tumours, transplantation passages and metastatic cells (author's transl)].

The metastatic spread following intravenous application of cells from primary and transplanted mammary carcinomas is described. When using cells from primary tumours the incidence rate was between 0 and 17%, but was much higher in the case of advanced tumours (transplantation passages and metastases).