TP53 and polyp: All the genes analyzed were expressed at comparable levels in the polyp samples obtained from the colon, rectum, and caecum, except S100A9 and TP53, whose expression was found to be increased in the distal regions: Rectum (p = 0.00874 and p = 0.005, respectively) and colon (p = 0.0233 and p = 0.0339, respectively) versus caecum (Figure 3).