Computed tomography overestimation of esophageal tumor length: Implications for radiotherapy planning

Table 1 Summary of clinicopathological factors and relationship with CT tumor length

Variable	n	P
Mean tumor length (range) (cm)
4.2 (0-11.5)
Median age (range) years (yr)
65 (36-82)	56	0.121
Gender
Male	48	0.922
Female	8
Neoadjuvant chemotherapy3
No	19	0.644
Yes	37
Tumor type
Adenocarcinoma	56
Tumor morphology
Polypoidal	14	0.074
Stenosing	15
Ulcerating	27
Differentiation
Well	4	0.361
Moderate	32
Poor	20
T-stage
T1	8	0.181
T2	13
T3	34
T4	1
N-stage
N0	19	0.122
N1	37
M-stage
M0	54
M1a	2
Resection category
R0	47	0.222
R1	9

CT: Computed tomography; R₀: Both macroscopic and microscopic clearance of the longitudinal resection margins; R₁: Microscopic evidence of tumor at the longitudinal resection margins;

¹Spearman’s;

²Mann-Whitney;

³CT scans were carried out following neo-adjuvant chemotherapy;

⁴ANOVA.