Fig. 4From: Surgical and molecular pathology of pancreatic neoplasms 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 geneBack to article page