Fig. 5From: Pancreatic medullary carcinoma developed on a pancreatic intraductal papillary mucinous neoplasm with loss of MSH2 and MSH6 expression: a case reportMismatch repair protein immunohistochemistry. A Diffuse nuclear expression of MLH1 (x20). B Diffuse nuclear expression of PMS2 (x20). C Loss of MSH2 expression, with positive internal control (x20). D Loss of MSH6 expression, with positive internal control (x20).Back to article page