CEACAM8 and neoplasm: Immunohistochemically stained CD66b+ neutrophils and total epithelial and stromal areas were detected in biopsies from the central tumor and invasion front (Figure 1A), resected lymph nodes, (Figure 1B), and adjacent normal tissue in the immediate vicinity of the tumor (prox) or at the margin of the resected tissue (dist) (Figure 1C).