Endoscopy 2022; 54(S 01): S128
DOI: 10.1055/s-0042-1744896
Abstracts | ESGE Days 2022
ESGE Days 2022 Digital poster exhibition

MODIFIED UNDERWATER ENDOSCOPIC MUCOSAL RESECTION FOR INTERMEDIATE-SIZED SESSILE COLORECTAL POLYPS

H.-S. Kim
1   Chonnam National University Hospital, GwangJu, Korea, Republic of
,
D.H. Kim
1   Chonnam National University Hospital, GwangJu, Korea, Republic of
,
S.-Y. Park
1   Chonnam National University Hospital, GwangJu, Korea, Republic of
,
H.S. You
1   Chonnam National University Hospital, GwangJu, Korea, Republic of
,
S.Y. Cho
1   Chonnam National University Hospital, GwangJu, Korea, Republic of
,
Y.H. Lee
1   Chonnam National University Hospital, GwangJu, Korea, Republic of
› Author Affiliations
 

Aims Underwater endoscopic mucosal resection (UEMR) is effective for treating intermediate-sized colorectal polyps. However, it is sometimes difficult to obtain visibility in underwater conditions.

Methods This prospective, observational, single center study included consecutive patients with intermediate-sized (10–20 mm) sessile colorectal polyps. Modified UEMR method was used to initially snare the lesion without injection or water infusion. Thereafter, water was infused until the lesion was submerged, then it was resected using electrocautery. We also evaluated the rates of complete resection and procedure-related complications.

Results Forty-two patients with 47 polyps were enrolled in the study. The median procedure time and fluid infusion were 71 s (42–607) and 50 mL (30–130), respectively. The rates of R0 resection and en bloc resection were 80.9% and 97.9%, respectively, with 100% technical success. R0 resection was observed in 42.9% of polyps sized≥15 mm and 87.5% sized<15 mm (p<0.01). Muscle entrapment was found in 71.4% of patients with polyps sized≥15 mm and 10%<15 mm (p<0.01). Immediate bleeding occurred in 12.8% of cases and was controlled using a snare tip or coagrasper. Snare-tip ablation and coagrasper ablation were performed in 27.7% and 6.4% of patients, respectively. No delayed bleeding, perforation, or any other complications were reported.

Conclusions Modified UEMR can be used in cases in which securing visibility or performing the existing UEMR is challenging. Careful treatment is required when removing polyps>15 mm in size.



Publication History

Article published online:
14 April 2022

© 2022. European Society of Gastrointestinal Endoscopy. All rights reserved.

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany