IL18 and colorectal carcinoma: Continuous exposure of the liver to multiple microbial products via portal circulation activates Fas ligand (FasL)‐sensitive CRC cells nucleotide‐binding domain, leucine‐rich‐repeat containing family, pyrin domain‐containing 3 (NLRP3) inflammatory vesicles and expresses IL‐18, which promotes NK cell maturation and initiates their tumoricidal function, and is an inhibitor of CRC metastatic growth in the liver.220