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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Arch Pathol Lab Med. 2019 Sep 11;143(11):1317–1326. doi: 10.5858/arpa.2019-0338-RA

Figure 5.

Figure 5.

Morphologic mimickers of pancreatic neuroendocrine neoplasms. A and B, Acinar cell carcinoma: relatively uniform cells forming acinar architecture with granular, eosinophilic cytoplasm. B, Trypsin immunohistochemical stain is strongly positive. C and D, Solid pseudopapillary neoplasm: sheets of polygonal cells with degenerative changes. D, The tumor cells are diffusely positive for nuclear β-catenin (hematoxylin-eosin, original magnification ×100 [A and C]; original magnification ×400 [B and D]).