Interestingly, the pre-neoplastic lesion associated with duct-derived Ptf1a-Cre; KRasG12D; Brg1f/f tumors was IPMN (von Figura et al., 2014), whereas duct-derived precursor lesions in our models were exclusively non-mucinous. The gene discussed is PTF1A; the disease is pancreatic intraductal papillary-mucinous neoplasm.