Table 1 Background and treatments of the 47 patients

Patients

n = 31

n = 16

Age (median)

33–80 (68)

42–77 (65)

0.31

Gender (male:female)

25:6

15:1

0.229

Observation period (median)

2.5–93.1 (34.2)

6.5–78.4 (39.0)

0.682

Location

0.959

  Cervical

2

0

  Upper thoracic

1

1

  Middle thoracic

18

10

Lower thoracic

10

5

Tumor depth

M3: 3

M3: 2

0.297

SM1: 15

SM1: 4

SM2: 13

SM2: 10

Radiation field

  Long T

11

15

0.0001

  Short T

3

1

  Local

17

0

Radiation dose (Gy)

  40 (−44)

0

10

0.00001

  54

1

0

  60

13

6

  60<

17

0

Chemotherapy

  Standard-dose FP

12

10

0.046

  Low-dose FP

6

4

  Low-dose 5-FU

9

2

  Others

4

0