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Table 1 Clinicopathological factors of patients treated by ESD with or without additional RT (n = 27)

From: Additional radiotherapy following endoscopic submucosal dissection for T1a-MM/T1b-SM esophageal squamous cell carcinoma improves locoregional control

Factors

 

RT group (n = 13)

Non-RT group (n = 14)

p-value

Age, yr. (mean ± SD)

 

66 ± 5

68 ± 7.4

0.31

Gender

Male

10

12

0.65

Female

3

2

 

Number of primary tumors

Single

12

10

0.36

Multiple

1

4

 

Location of tumor

Ut

3

2

0.59

Mt

8

11

 

Lt

2

1

 

Invasion depth

pT1a-MM

6

10

0.25

pT1b-SM1

7

4

 

Circumferential extent of ESD

< 3/4

7

10

0.44

≥3/4

6

4

 

Longitudinal diameter of ESD (mm; mean ± SD)

 

43 ± 17

42 ± 21

0.88

Positive resection margin

 

1

0

1.00

Positive lymphatic invasion

 

1

0

0.48

Positive vascular invasion

 

0

0

1.00

Additional chemotherapy

(+)

4

4

1.00

 

(−)

9

10

 
  1. ESD endoscopic submucosal dissection, RT radiotherapy, Ut upper thoracic tumor, Mt. middle thoracic tumor, Lt lower thoracic tumor, T1a-MM tumor invading muscularis mucosae, T1b-SM1 tumor invading the upper third of the submucosa