CXCL8 and adenoma: The expression level of NF-κB mRNA and IL-8 mRNA (figure 3) was tested by ISH staining in tumorous versus non-tumorous tissue sections in CRC and adenoma patients (Table 1 and 2) and normal mucosal tissue sections from control subjects versus tumorous and non-tumorous tissue sections of CRC and adenoma patients (Table 1 and 2).