The purpose of this study has three specific aims: (1) to determine the relationship between peritoneal washing cytology (PWC) results and clinicopathologic parameters of pancreatic cancers, (2) to identify the predictive value of PWC and postoperative drainage cytology on the peritoneal recurrence or outcomes, (3) to dissect the molecular mechanism of peritoneal recurrence, especially on the PWC-inducing peritoneal seeding process.
