Table 3

Histology of resected specimen

Patients with successful ESD or EMR2020
No dysplasia130.61
Low-grade intraepithelial neoplasia200.49
High-grade intraepithelial neoplasia020.49
 Deepest vertical invasion
  Submucosa, upper third (sm1)620.24
  Submucosa, middle third (sm2)111.00
 Infiltration of lymphatic (L1) or venous vessels (V1)00
Complete resection of HGIN or AC (R0)10/172/170.01
Curative resection of HGIN or AC with vertical invasion limited
  To the mucosa6/172/170.22
  To the mucosa or submucosa (sm1) with low-risk factors9/172/170.03
Incomplete resection of HGIN or AC (R1)7/1715/170.01
 At horizontal margins (R1 HM+R0 VM)4140.0036
 At vertical margins (R1 VM+R0 HM)101.00
 At vertical and horizontal margins (R1 VM+R1 HM)211.00
  • EMR, endoscopic mucosal resection; ESD, endoscopic submucosal dissection; HM, horizontal tumour margins; VM, vertical tumour margins.