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
