DNMT1 and pancreatic intraductal papillary-mucinous neoplasm: In the small subset of IPMN cases with miRNA and mRNA expression data, positive correlations between miRNA and mRNA expression were evident in 2 miRNA-mRNA pairs, miR-342-3p: DNMT1 (r = 0.81, P = 0.05) and miR-126: IRS1 (r = 0.78, P =0.07).