In the pancreata containing preinvasive lesions and classical tumours, CD45+ cells represented the 51.7 ± 13.06% and 37.2 ± 9.24% of total cells, respectively, whereas a substantial decrease in total leukocytes was observed in PDC (19.50 ± 8.6%) (Fig. S2a). This evidence concerns the gene PTPRC and neoplasm.