From: Prognostic impact of postoperative radiation in patients undergoing radical esophagectomy for pathologic lymph node positive esophageal cancer
Stage Grouping
PORT
Surgery alone
Total No. of Patients
T1-2N1
IIB
20
52
72
T1-2N2
IIIA
23
19
42
T3N1
85
167
252
T3N2
IIIB
69
119
188
T4N1-3
IIIC
61
110
171
258
467
725