Pancreatectomy with venous vascular resection for pancreatic cancer: Impact of types of vein resection on timing and pattern of recurrence.

ABSTRACT

INTRODUCTION: Few studies analysed the impact of different venous resection techniques on recurrence in patients with pancreatic ductal adenocarcinoma (PDAC). Primary aim was to compare local recurrence rate and disease-free survival (DFS) between patients who underwent pancreatectomy with tangential versus segmental resection of portal vein/superior mesenteric vein. MATERIALS AND METHODS: All consecutive patients who underwent pancreatectomy with venous resection for PDAC between 2009 and 2019 were included. A propensity score matching (PSM) was used to reduce the effect of treatment selection bias. RESULTS: Overall, 120 patients (68%) underwent pancreatectomy with tangential venous resection and 57 patients (32%) were submitted to pancreatectomy with segmental venous resection. After a median follow-up of 24 months, local recurrence was comparable between the two groups (tangential n = 32/120, 26.7% versus segmental n = 10/57, 17.5%; p = 0.58). The median DFS was 17 months (IQR 9-31) in patients who underwent tangential resection, as compared to 12 months (IQR 5-21) in those who underwent segmental resection (p = 0.049). After PSM (n = 106), the median DFS was 18 months (IQR 9-26) in the tangential resection group, and 12 months (IQR 5-21) in the segmental resection group (p = 0.17). In the PSM population, lymph node ratio (HR 4.83; p = 0.028) and tumor size >25 mm (HR 3.26; p = 0.007) were identified as determinants of local recurrence. CONCLUSION: Tangential venous resections are not associated with a higher rate of local recurrence. Long-term outcomes are more related to tumors characteristics than to venous resection techniques. A step-up approach to vein resection, with tangential resection being performed whenever technically feasible, should be strongly encouraged.