Table 3. Criteria for borderline resectable pancreatic cancer.

Vessel	MD Anderson [2006]	AHPBA/SSAT/SSO [2008]	Alliance A021101 Trial [2013]	IAP [2016]	NCCN 1.2019 [2018]
SMV-PV	Short-segment occlusion with suitable vessel above and below; segmental venous occlusion alone without SMA involvement is rare and should be apparent on CT images	Abutment >180° or occlusion amenable to resection and reconstruction	Interface between tumor and vessel measuring ≥180° and/or reconstructable occlusion	Tumor contact ≥180° or invasion of the SMV/PV with bilateral narrowing or occlusion, and not exceeding the inferior border of the duodenum	Solid tumor contact with the SMV or PV of >180°, contact of ≤180° with contour irregularity of the vein or thrombosis of the vein but with suitable vessel proximal and distal to the site of involvement allowing for resection and vein reconstruction
SMA	Tumor abutment ≤180°; periarterial stranding and tumor points of contact forming a convexity against the vessel improve chances of resection	Abutment <180°	Interface between tumor and vessel <180° of vessel	Tumor contact/invasion of ≤180° without showing stenosis/deformity	Solid tumor contact with the SMA of ≤180°
CHA	Short-segment encasement/abutment of the common hepatic artery (typically at the GDA origin); the surgeon should be prepared for vascular resection/ interposition grafting	Abutment or short-segment encasement, amenable to reconstruction	Reconstructable, short-segment interface between tumor and vessel of any degree	Tumor contact/invasion without showing tumor contact/invasion of the PHA and/or CA	Solid tumor contact with CHA without extension to CA or HA bifurcation allowing for complete resection and reconstruction
Celiac axis	Abutment of ≤180° of the circumference of the celiac axis	No abutment or encasement	Interface between tumor and vessel <180° of vessel	Tumor contact/invasion of ≤180° without showing stenosis/deformity	Solid tumor contact with the CA of ≤180° or of >180° without involvement of the aorta and with intact and uninvolved GDA thereby permitting a modified Appleby procedure