Borderline resectable pancreatic cancer and vascular resections in the era of neoadjuvant therapy

Table 1 Definition of borderline resectable pancreatic cancer in different classifications

	AHPBA classification[20]	NCCN classification[20]	JPS classification[18]
VenousPV/SMV
	Contact or encasement	Contact > 180 or ≤ 180 with contour irregularity or thrombosis of the vein	SMV/PV: Tumor contact/invasion of 180° or more/occlusion not exceeding the inferior border of the duodenum.
	Short venous segment occlusion
	Reconstructible	Reconstructible	SMA, CA, CHA: No tumor contact/invasion.
Arterial
SMA	Contact ≤ 180°	Contact ≤ 180°	SMA, CA: Tumor contact/invasion of less than 180° without stenosis/deformity.
CHA	Direct contact	Contact without extension to CA or HA bifurcation	CHA: Tumor contact/invasion without showing tumor.
	Short segment encasement
CA	No contact	Contact ≤ 180°	Contact/invasion of the PHA and/or CA. (In case of contact/invasion to both portal vein and peripancreatic arteries, it was graded as BR-A.)
		Contact > 180° without contact of aorta/uninvolved GDA

AHPBA: American Hepato-Pancreato-Biliary Association; CA: Celiac artery; CHA: Common hepatic artery; GDA: Gastroduodenal artery; HA: Hepatic artery; JPS: Japan Pancreas Society; NCCN: National Comprehensive Cancer Network; PHA: Proper hepatic artery; PV: Portal vein; SMA: Superior mesenteric vein; SMV: Superior mesenteric vein.