Abstract
691 Background: Advances in multidisciplinary treatment for pancreatic cancer (PC) have increased surgical opportunities for initially unresectable locally advanced (UR-LA) or borderline resectable PC. In order to obtain a high rate of R0 resection, it is important to select an appropriate approach according to the infiltration site of the artery that can determine whether curative surgery is possible or not at early phase of the operation. Methods: From April 2012 to December 2018, 81 patients who were scheduled for curative resection for UR-LA or borderline resectable PC that contact the main artery (BR-A). In our institution, if a tumor is in contact with the superior mesenteric artery (SMA), we select the mesenteric approach. And if a tumor is in contact with the common hepatic artery (CHA) and/or celiac artery (CA), we open the lesser omentum and then dissect from the cranial side of pancreas to the diaphragm leg to judge the resectability before dividing the stomach. When arterial plexus infiltration is observed during surgery, we abandoned curative surgery or we performed combined resection of CHA and reconstruction if possible. Results: There were 69 BR-A and 12 UR-LA patients. Macroscopic curative resection was performed in 67 (83%) of 81 patients, and 14 patients were unresectable. Pancreatoduodenectomy was performed in 54 patients, distal pancreatectomy (DP) in 8, and DP with celiac axis resection in 7. There were 67 patients with vascular resection / reconstruction. R0 resection was obtained in 64 of 67 patients among curative resection. The median blood loss, operation time, and length of hospital stay were 714 mL, 439 minutes, and 19 days, respectively. The complications of Clavien-Dindo grade 3a or higher were observed in 18 patients (27%). There were no post-operative deaths. The 3-year survival rate after surgery was 70.3%, and there was no significant difference between BR-A and UR-LA (P = 0.701). The 3-year recurrence-free survival rate after surgery was 34.4%, which was not significantly different between the two groups (P = 0.816). Conclusions: A high R0 resection rate (96%) was obtained by an appropriate approach that can determine the resectability at early stage of operation, and high R0 rate leads to good outcomes.
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