The Utility of Preoperative Vascular Grading in Patients Undergoing Surgery First for Pancreatic Cancer: Does Radiologic Arterial or Venous Involvement Predict Pathologic Margin Status?

Table 2

Vascular involvement by (a) Ishikawa and (b) arterial classification.

(a)

		Any Positive Margin			SMA	SMV
Ishikawa; Classification			%	-value			%	-value
I: normal portal vein confl	84	19	22.6	0.0001	12	4	4.8	0.0001
II: smooth shift	23	13	56.5		10	6	26.1
III: unilateral narrowing	15	11	73.3		8	5	33.3
IV: bilateral narrowing	12	8	66.7		7	4	33.3

(b)

		Any Positive Margin			SMA			SMV
Arterial; Classification			%	-value		%	-value		%	-value
i: clean	71	20	28.2	<0.0001	14	19.7	0.062	7	9.9	0.63
ii: dirty fat	15	10	66.7		6	40.0		3	20.0
iii: abutment	10	5	50.0		4	40.0		1	10.0