A case in point, clearly pertinent to this report is that of MUC1-TM itself, which is universally accepted as linked in some way to breast cancer (see above and for a recent review [15]), despite the fact that MUC1-TM is extensively expressed on epithelial cells of, amongst others, the normal pancreas, kidney and normal, lactating breast. This evidence concerns the gene MUC1 and breast carcinoma.