From: Elective nodal irradiation versus involved-field irradiation for stage II–IV cervical esophageal squamous cell carcinoma patients undergoing definitive concurrent chemoradiotherapy: a retrospective propensity study with 8-year survival outcomes
ENI (n = 49)
IFI (n = 49)
No.
%
Local failure
11
22.4
13
26.5
Regional failure
7
14.3
2
4.1
Distant metastasis
9
18.4