Table 2.

Comparison of tumor epicenter and T stages between original and revised diagnoses

(A)
	Revised tumor epicenter
Original tumor epicenter	Periampullary duodenum	AOV	Pancreatic head	Distal CBD	Proximal CBD	Total
Periampullary duodenum	0	2	0	1	0	3
AOV	0	29	3	5	0	37
Pancreatic head	0	2	33	2	0	37
Distal CBD	0	1	8	38	0	47
Proximal CBD	0	0	0	2	0	2
Total	0	34	44	48	0	126
(B)
	Revised T stage
Original T stage	Tis	T1	T2	T3	T4	Total
Tis	1	0	0	0	0	1
T1	0	21	0	0	0	21
T2	0	0	27	2	0	29
T3	0	0	2	64	1	67
T4	0	0	0	1	7	8
Total	1	21	29	67	8	126