[Cross-reacting epithelial antigen of ectodermal origin in mouse tumors].

Cross-reacting antigen (CR-antigen) previously found by indirect immunofluorescence in cell elements of murine multilayer epithelial cells (except corneal epithelium) to play the role of antigenic label of cover epithelia of ectodermal origin was found in mice tumor cells, related histogenetically with multilayer epithelium (transplantable proventricular cancer, two strains of squamous-cell cervical cancer in mice). CR-antigen was observed in transplantable breast adenocarcinoma and in transplantable mice teratocarcinoma.