Primary tumor cannot be assessed
0
No evidence of primary tumor
1
Carcinoma in situ
2
Tumor limited to pancreas, ≤2 cm in greatest dimension
3
Tumor limited to pancreas, >2 cm in greatest dimension
4
Tumor extends beyond pancreas but without involving celiac axis or Superior Mesenteric Artery (SMA)
5
Tumor involves celiac axis or SMA (unresectable primary)
6
