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A group of epithelial neoplasms that arise from the exocrine pancreatic tissue and have the potential to evolve into invasive malignant neoplasms. This group includes the pancreatic intraepithelial neoplasias, non-invasive pancreatic mucinous-cystic neoplasms, pancreatic intraductal papillary-mucinous neoplasms, and pancreatic intraductal tubulopapillary neoplasms.
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