Table 1 Comparison of demographics and characteristics of primary esophageal SCCs according to FDG avidity on PET/CT (n = 121)

 Median, range

63, 48–85

67, 33–81

Sex (male/female)

79/6

32/4

 Upper third

14

4

 Mid third

43

21

 Lower third

20

11

 Upper to mid

6

0

 Mid to lower

2

0

Pretreatment endoscopy in our hospital (performed/not performed)

83 / 2

33 / 3

 Operation

37

22

 Endoscopic submucosal dissection

0

1

 Concurrent chemoradiation therapy

25

4

 Radiation therapy alone

1

0

 Chemotherapy alone

9

1

Follow-up loss without any therapy (follow-up loss/treatment in our hospital)

13 / 72

8 / 28