primary cultures comprised both nadph-neotetrazolium reductase-positive carcinoma cells and nadph-neotetrazolium reductase-negative cells of stromal appearance , as well as normal epithelial cells ( petersen and van deurs , cancer res. , 46 : 2013-2020 , 1986 ) .
C0007097
carcinoma
C0014597
epithelial