Relationship between surgical R0 resectability and findings of peripancreatic vascular invasion on CT imaging after neoadjuvant S-1 and concurrent radiotherapy in patients with borderline resectable pancreatic cancer

Table 4 Relationship between peripancreatic vascular invasion and clinicopathological variables on CT imaging

	NVI group (n = 20)	PVI group (n = 9)	P value
R0 resection rate	18 (90%)	9 (100%)	1.000
Change in CEA (%)	+ 5% [−51 − + 138]	−4% [− 54 − + 140]	0.572
Change in CA 19–9 (%)	− 45% [−94 − + 82]	−58% [−85– − 13]	0.278
RECIST classification (PR/SD/PD)	3 (15%)/17 (85%)/0	0/8 (89%)/1 (11%)	0.167
Evans grade ≥ IIB	6 (30%)	2 (22%)	1.000

PVI Progression of vascular invasion, NVI Non-progression of vascular invasion, CEA Carcinoembryonic antigen, CA 19–9 Carbohydrate antigen 19–9, RECIST Response evaluation criteria in solid tumors, PR Partial response, SD Stable disease, PD Progressive disease. Data are presented as n (%) or median [range]

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