8th edition TNM pancreatic cancer staging

T staging 
TXPrimary tumor cannot be assessed
T0No evidence of primary tumor
TisCarcinoma in situ
T1Tumor < or = 2 cm in greatest dimension
T2Tumor > 2 cm, but < or = 4 cm in greatest dimension
T3Tumor > 4 cm in greatest dimension
T4Tumor involves the celiac axis, superior mesenteric artery and/or common hepatic artery
N staging 
NX Regional lymph nodes cannot be assessed
N0No regional lymph nodes
N1Regional (peripancreatic) lymph node metastasis
M staging 
M0No distant metastasis
M1Distant metastasis