Four antibodies against different epitopes of MUC1 (Figure 2) were used to stain patient samples representing various stages toward progression to cancer; Sq epithelium, NDBE, low-grade dysplasia (LGD), high grade dysplasia (HGD) and invasive esophageal adenocarcinoma (EA). This evidence concerns the gene MUC1 and Esophageal atresia.