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Fig. 4 | Diagnostic Pathology

Fig. 4

From: Surgical and molecular pathology of pancreatic neoplasms

Fig. 4

a Macroscopic appearance of pancreatic neuroendocrine tumor showing a well-demarcated pinkish tumor surrounded by normal pancreatic parenchyma. b Pancreatic neuroendocrine tumor, detail showing typical salt and pepper chromatin. c Loss of Menin expression in pancreatic neuroendocrine tumor indicative of MEN1 gene inactivation. d Retained Menin expression in pancreatic neuroendocrine tumor with a wildtype MEN1 gene

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