Immuno-histochemical staining for protein product expression of (A) up-regulated genes (DSC3, ALDOB, EPHX4, ARHGAP24) and (B) down-regulated genes (MS4A12, TMIGD1, CASP5) in normal colon (NC) and normal appendiceal (NA) mucosa, diseased appendix (DA), and disseminated disease (DD), with positive and negative controls.