From: Three-dimensional conformal radiation for esophageal squamous cell carcinoma with involved-field irradiation may deliver considerable doses of incidental nodal irradiation
Location
Upper
Middle
Lower
Number
12
15
Length (cm)
6.75 (3.0-9.9)
7.5 (4.5—12.0)
5.9 (2.0—9.0)
Volume (cm3)
17.9 (4.0-74.4)
25.8 (9.0—83.5)
15.5 (2.4—105.0)
T stage
T1-3
8
11
10
T4
4
2