Table 1 Loyer’s Criteria [7]

A

Fat plane separates tumor and/or normal pancreatic parenchyma from adjacent vessels.

B

Normal parenchyma separates hypodense tumor from adjacent vessels.

C

Hypodense tumor is inseparable from adjacent vessels, points of contact form a convexity against vessels.

D

Hypodense tumor is inseparable from adjacent vessels, points of contact form a concavity against or partially encircle vessels.

E

Hypodense tumor encircles adjacent vessels, no fat plane is identifiable between tumor and vessels.

F

Tumor occludes vessels.