Figure 12 Native Barrett's glandular tissues stained with the proliferation protein Minichromosome maintenance protein 2 and counterstained with haematoxylin, demonstrating oesophageal glands fusing with the squamous epithelial surface. A segment of columnar epithelium on the far right contains glandular debris, which could result from the fusion of glands with the new epithelial surface (arrow) (×200).