Endoscopic submucosal dissection for proximal colonic lesions: An effective therapeutic option

Abstract

Background and study aims

Due to the greater risks of adverse events (AEs) and the lower rate of submucosal invasive cancer (SMIC), large proximal colonic polyps are frequently treated by piecemeal endoscopic mucosal resection (EMR) in the West. However, this implies the risk of surgery to radicalize non-curative endoscopic resection in case of early colorectal cancer (CRC). We evaluated procedure outcomes in patients undergoing ESD for proximal colonic lesions at risk of SMIC.

Patients and methods

All consecutive patients with lesions at risk of SMIC proximal to splenic flexure referred for ESD at a tertiary center were prospectively included from 2019 to 2021. En bloc, R0, and curative resection rates were primary outcomes, while length of hospitalization, AEs, need for surgery due to AEs, and recurrence rates were secondary outcomes.

Results

A total of 116 patients (mean age: 68.4±10.91 years; men: 69.8%) were included. En bloc, R0, and curative resection rates were 84.5%, 78.4%, and 72.4%, respectively. T1 adenocarcinoma was reported in 25% of lesions (29/116). Eleven patients (9.5%) underwent secondary surgery due to non-curative resections; residual disease was found in one patient. Most frequent AE was intra-procedural perforation (9.9%); no AE required surgery. Median follow-up was 36 months; three of 97 recurrences (3.1%) at 6 months and one of 85 recurrence (1.2%) at 36 months were reported, which were all endoscopically treated.

Conclusions

In expert hands, ESD is effective and safe for proximal colonic lesions at risk of SMIC for the favorable balance between risk of AEs and benefit of avoiding unnecessary surgery, even for early CRC.

Keywords

Endoscopy Lower GI Tract - Endoscopic resection (polypectomy, ESD, EMRc, ...) - Colorectal cancer - Polyps / adenomas / ...

Publication History

Received: 30 July 2024

Accepted after revision: 16 October 2024

Accepted Manuscript online:
03 January 2025

Article published online:
29 January 2025

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