The aims of this study were to identify genetic characteristics of intraductal papillary mucinous neoplasm (IPMN
)-associated pancreatic ductal carcinoma (PDC) and to detect these markers using pancreatic juice.
From 76 cases, 102 tissues were obtained: 29 cases were noninvasive IPMN
, 18 were PDC derived from IPMN
(D-PDC; noninvasive part, n = 16; invasive part, n = 18), and 29 were PDC concomitant with IPMN
part, n = 10; PDC part, n = 29). Moreover, pancreatic juice samples from 28 cases were obtained (noninvasive IPMN
, n = 13; D-PDC, n = 7; C-PDC, n = 8). Fifty-one cancer-related genes were analyzed by next-generation sequencing
mutation rates in D-PDC, C-PDC, and noninvasive IPMN
were 67%, 66%, and 10%, respectively. Moreover, KRAS
mutational patterns between 2 simultaneous tumors differed in 1 (6.3%) of the 16 D-PDC cases and in 8 (80%) of the 10 C-PDC cases (P
= 0.0006). TP53
or multiple KRAS
mutations were detected using pancreatic juice more frequently in C-PDC cases than in noninvasive IPMN
cases (75% and 23%, respectively, P
mutations along with TP53
mutation are genetic markers for C-PDC, which could be detected using pancreatic juice preoperatively.