PANCREAS
T: primary tumor
TX	Primary tumor cannot be assessed
T0	No evidence of primary tumor
Tis	Carcinoma in situ
T1a	Tumor 5 mm or less in greatest dimension
T1b	Tumor greater than 5 mm and less than 1 cm in greatest dimension
T1c	Tumor greater than 1 cm but no more than 2 cm in greatest dimension
T2	Tumor more than 2 cm but no more than 4 cm in greatest dimension
T3	Tumor and more than 4 cm in greatest dimension
T4	Tumor involves celiac axis, superior mesenteric artery or common hepatic artery
N: regional lymph nodes
NX	Regional lymph nodes cannot be assessed
N0	No regional lymph node metastasis
N1	Metastasis in 1?3 regional lymph nodes
N2	Metastasis in 4 or more regional lymph nodes
M: distant metastasis
M0	No distant metastasis
M1	Distant metastasis