when malignant w-256 rat breast carcinosarcoma cells are mixed with an equal number of normal adult rat liver fibroblasts and allowed to grow in a medium containing sufficient l-methionine and an excess of vitamin b12 and of folic acid , the malignant cells outgrow the normal cells , and within 2 weeks the tissue culture flasks contain only neoplastic cells .
C1513365
breast carcinosarcoma
C0334227
malignant cells