CXCL6 and neoplasm: In the cBioPortal database, we found that the mutation type of CXCL3 and CXCL6 in GC was an “amplification” mutation, but its alteration frequency was only approximately 0.7%, indicating that amplification-based mutations were not associated with gene overexpression in tumor tissues; no mutations were detected on the main domains of CXCL3 and CXCL6 genes.