Retrospective Cohort Study
Copyright ©The Author(s) 2023.
World J Gastrointest Endosc. May 16, 2023; 15(5): 386-396
Published online May 16, 2023. doi: 10.4253/wjge.v15.i5.386
Table 2 Endoscopic results of appendiceal polyp resection by procedure type, n (%)

Total
EMR
ESD
Hybrid EMR/ESD
P value
Total patients (n)19568
Polyp Appearance (mean ± SD)
Size (mm)25.5 ± 14.226.0 ± 13.425.0 ± 18.425.6 ± 13.20.99
Localized to appendix (at or inside the appendiceal orifice)14 (74)3 (60)6 (100)5 (63)
50% or more involvement of the appendiceal orifice 13 (68)3 (60)5 (83)5 (63)
Granular, lateral-spreading5 (26)0 (0)2 (33)3 (30)
Flat, lateral-spreading1 (5)0 (0)0 (0)1 (13)
Not lateral-spreading13 (68)5 (100)4 (67)4 (50)
Paris classification: Is12 (63)3 (60)2 (33)7 (88)
Lesion fibrosis2 (11)0 (0)0 (0)2 (25)
Procedure (mean ± SD)
Duration of Procedure (min)61.6 ± 37.943.8 ± 31.571.0 ± 54.465.8 ± 26.10.48
Procedures needing clips 18 (95)4 (80)6 (100)8 (100)
Number of clips used 3.9 ± 1.62.8 ± 0.53.5 ± 2.25.0 ± 1.20.02
Additional resection of non-appendiceal polyps4 (21)2 (40)0 (0)2 (25)
ESD knife used (DualKnife/Orise ProKnife)N/AN/A4/2 (67/33)7/1 (88/12)
Traction method used3 (21)0 (0)1 (16.7)2 (25)
Stabilization (Dilumen or Pathfinder)10 (53)1 (20)4 (67)5 (63)
Hemostasis needed (with Cograsper)3 (16)0 (0)2 (33)1 (13)
Outcome (mean ± SD)
Admission for post-procedure observation2 (11)0 (0)1 (17)1 (13)
Duration of Admission (d)2.5 ± 2.10 ± 04.0 ± 01.0 ± 0
Post-Procedure Pain1 (5)0 (0)1 (17)0 (0)
Adenoma on pathology report19 (100)5 (100)6 (100)8 (100)
Submucosal/Perineural/Lymphovascular Invasion0 (0)0 (0)0 (0)0 (0)
R0 rate for en bloc resection14 (88)a4 (80)6 (100)4 (80)a0.56
Curative resection rate14 (74)4 (80)6 (100)4 (50)0.11
En Bloc resection rate16 (84)5 (100)6 (100)5 (63)0.09
Repeat colonoscopy done8 (57)b0 (0)2 (67)b6 (75)