All distinguished in these analyses (Figure 1A,C,E) results show differentially expressed genes related to the histaminergic system in CRC with a comparison to the control; those that met the criteria and presence in BH-corrected analysis are the following: GNA15 (encoding G protein subunit alpha 15), MAOA (encoding monoamine oxidase A) and WASF2 (encoding Wiskott–Aldrich syndrome protein family member 2). Here, MAOA is linked to colorectal carcinoma.