Association of numbers of CD15-positive PMN with azurocidin-positive spindle shaped cells: (A): In PDAC tissues of the MRI cohort, the number of PMN correlated with the number of spindle shaped cells (Pearson correlation coefficient: 0.85). (B,C) Representative examples of tissues with high (B) and low (C) numbers of PMN are shown. Arrows indicate azurocidin-positive spindle shaped cells. (D) By laser scanning microscopy of PDAC tissue, azurocidin is seen in spindle shaped cells (red, marked by white arrows in the zoomed images), in part also associated with actin (intense yellow). The smaller cells (marked by white arrowhead) are azurocidin-positive PMN. Abbreviations: CD15: cluster of differentiation antigen 15; PMN: polymorphonuclear neutrophil granulocytes.