S100A9 Immunohistochemistry. Representative images from the sigmoid colon in (A) Normal colon (20x) (B) Quiescent UC (20x) and (C 10x, D 20x) non-dysplastic mucosa in a UC patient with a remote dysplastic lesion. Note increased stromal staining in (C, D) compared to (A, B). (E–H) IBD-cancer tissue array: Representative images from 2 sections with positive stromal staining (E, F) and 2 sections with glandular staining (G, H). Larger images are 20x magnification. Insets are at 40x magnification.