For example, Sheibani et al., (1991) studied adenocarcinomas from the breast that did not stain (32%, 8/25), and Bailey et al., (1996) evaluated 11 formalin-fixed paraffin-embedded cell blocks of adenocarcinoma effusions and 16 formalin-fixed paraffin-embedded cell blocks of benign effusions and found them 100% positive for Ber-EP4 among the adenocarcinoma cases over against none of the mesothelium cases. This evidence concerns the gene EPCAM and adenocarcinoma.