CXCL5, a strong neutrophil-chemoattractant, has been reportet to be expressed in different cancer entities with diverse outcomes in disease progression. Contradictory outcome in disease progression in different tumor entities might be explained by a tumor type specific expression pattern of chemokines, chemokine receptors and growth factors that act in concert with CXCL5. This study evaluates the impact of CXCL5 expression on the tumor mircoenvironment in a syngeneic mouse melanoma model. Overall design: 105 B16F1 and B16F1-CXCL5 murine melanoma were injected intradermally into the flank skin of C57BL/6 J mice. Primary tumors were grown up to 250-350mmÂ³, excised, snap frozen and then processed for RNA sequencing.