LCN2 and posterior cortical atrophy: Specifically, a list of CXCL1-associated candidates was stratified from 18 independent human PCa gene expression data sets from the GEO data bank (Additional file 1: Table S1), which highlighted IL8/CXCL8 and LCN2 as neutrophil-derived cytokines that were closely associated with CXCL1.