Table 3 Characteristics of endoscopic resection and histopathological assessments in flat lesions and non-flat lesions.

From: Endoscopic resection for local residual or recurrent cancer after definitive chemoradiotherapy or radiotherapy for esophageal squamous cell carcinoma

 

Flat lesions, n = 59

Non-flat lesions, n = 39

P

Endoscopic resection, n (%)

 ESD/EMR

39/20 (66/34)

32/7 (82/18)

0.11

Invasion depth, n (%)

 EP/LPM/MM/SM1/SM2/undetermined

29/25/3/2/0/0 (49/42/5/3/0/0)

2/5/5/2/24/1 (5/13/13/5/62/3)

 < 0.0001

Horizontal margin, n (%)

 Negative/positive/unclear

48/1/10 (81/2/17)

32/4/3 (82/10/8)

0.085

Vertical margin, n (%)

 Negative/positive/unclear

59/0/0 (100/0/0)

30/8/1 (77/21/3)

0.00014

Lymphatic invasion, n (%)

 Negative/positive

59/0 (100/0)

34/5 (87/13)

0.0085

Venous invasion, n (%)

 Negative/positive

59/0 (100/0)

32/7 (82/18)

0.0011

En bloc resection, n (%)

56 (95)

38 (97)

 > 0.99

R0 resection, n (%)

46 (78)

26 (33)

0.25

Endoscopic R0 resection, n (%)

59 (100)

30 (77)

0.00014

  1. P < 0.05 was considered statistically significant.
  2. EMR, endoscopic mucosal resection; EP, epithelium; ESD, endoscopic submucosal dissection; LPM, lamina propria; MM, muscularis mucosae; SM, submucosal layer.
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