The architecture of the present tumor was consistent with the comedo pattern. Cytokeratin 14 staining was widespread in the present tumor, which we interpreted to be indicative of a basal cell origin.

3D image of mammary organoids used to test response to new combination drugs. In pink, cytokeratin 8 staining marking luminal epithelial cells; in white, cytokeratin 14 staining basal epithelial ...