Consistent with previous reports on expression of Nrp1 in tumor and stromal cells in PDAC [29, 35, 36], Nrp1 immunoreactivity was found on tumor cells, parenchymal nerves and on vascular endothelial cells, but was only weakly present in epithelial cells of healthy pancreas (Fig. 3E and F). The gene discussed is NRP1; the disease is neoplasm.