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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: Pancreas. 2018 Oct;47(9):1123–1129. doi: 10.1097/MPA.0000000000001150

FIGURE 1. PD-L1, PD-L2 and PD-1 in tumor and stromal cells.

FIGURE 1.

A, Membranous expression of PD-L1 in pNET. High expression was rare and found in only 7% of cases. B, High expression of PD-L1 in immune stromal cells (head arrows) was found in only a single case of SINET. C, High expression of PD-L2 in pNET tumor cells. Expression was predominantly cytoplasmic with approximately 5% of cells also showing membranous expression (arrows). D, Representative low density expression of PD-1 in immune stromal cells in SINET (head arrow).