epithelial components in breast carcinomas comprise , in addition to carcinoma epithelial cells ( cep ) , at least two epithelial cell types organized in mammary ductules of normal appearance as an inner layer of luminal epithelial cells ( lep ) and an outer layer of basal or myoepithelial cells ( mep ) resting on a basement membrane .
C0678222
breast carcinomas
C0014597
epithelial