Table 1 Clinicopathological features of patients with superficial squamous cell neoplasia (N = 137)

Age, years, mean ± SD

62.4 ± 7.8

Age in subgroups, years, n (%)

 < 50/ ≥ 50, < 60/ ≥ 60, < 70/ ≥ 70

9(6.6)/37(27.0)/68(49.6)/23(16.8)

Sex, n (%)

 Male/female

92(67.1)/45(32.9)

Lesion size, mm, mean ± SD

21.9 ± 15.1

Size in subgroups (mm), n (%)

 < 10/ ≥ 10, < 20/ ≥ 20, < 30/ ≥ 30

27(19.7)/43(31.4)/30(21.9)/37(27.0)

Circumferential extent of lesions, n (%)

 < 50%/50–75%/ > 75%

122(89.1)/12(8.7)/3(2.2)

Location in esophagus, n (%)

 Upper/middle/lower

13(9.5)/105(76.6)/19(13.9)

Color under white light endoscopy, n (%)

 Reddish/whitish/no obvious change

99(72.3)/23(16.8)/15(10.9)

Gross type, n (%)

 Elevated/flat/depressed

11(8.0)/97(70.8)/29(21.2)

Treatment, n (%)

 ESD/MBM

125(91.2)/12(8.8)

En bloc resection, n (%)

133(97.1)

 R₀ resection, n (%)

130(94.9)

 Perforation, n (%)

4(2.9)

 Stricture, n (%)

10(7.3)

 Delayed bleeding, n (%)

2(1.5)

Final histology, n (%)

 Negative for neoplasia/LGIN/HGIN/ESCC

2(1.6)/16(11.6)/60(43.8)/59(43)

 Mucosal cancer/Submucosal cancer

47(79.7)/12(20.3)