BRCA1 and familial pancreatic carcinoma: It is not clear whether pancreatic cancer susceptibility genes such as BRCA1, BRCA2, CDKN2A, mismatch repair genes (MLH1, MSH2, MSH6, PMS2, and EPCAM), ATM, PALB2, STK11, and TP53 are associated with IPMNs.