Endoscopic full-thickness resection with an over-the-scope clip device (FTRD) in the colorectum: results from a university tertiary referral center

Background and study aims The full-thickness resection device (FTRD) represents a novel endoscopic treatment method for lesions unresectable with conventional endoscopic techniques. The overall aim of this study was to evaluate technical success and in toto resection rates, recurrence rates, as well as immediate or late complications in patients who underwent polyp removal with the FTRD. Patients and methods Data from a prospectively collected database of 12 patients who underwent 13 over-thescope clip-based full-thickness resections between June 2015 and June 2017 were analyzed. Follow-up endoscopy was performed in 11 out of 12 patients. Results 13 full-thickness resections were performed in 7 males and 5 females (mean age 64.3 +/- 6.3 years). Mean size of the lesions removed with FTRD was 17 +/- 4mm. Location was rectum (n = 6), cecum (n = 2), ascending colon (n = 2), left flexure (n = 1) and right flexure (n = 2). Mean procedure time was 68 +/- 35 minutes and mean hospital stay was 2.5 +/- 1.2 days. 2 patients developed post-polypectomy syndrome, which resolved after conservative treatment. No perforations and no immediate surgical revision were needed. Histology of the 13 lesions removed with FTRD showed 5 adenomas with low grade intraepithelial neoplasia (IEN), 4 high grade IEN, 1 fibrosis, 1 fibrosis without dysplasia and 2 adenocarcinomas. Technical success was achieved in all procedures (13/13, 100 %). R0 resection was achieved in 10/12 patients (83.3%). 2 patients underwent surgery because of recurrence or not evaluable margins. In 1 patient no residual malignancy was proven in histological examination, in the other patient residual low grade IEN adenoma. Conclusion FTRD is a minimally invasive approach with good success rate of complete resection and minimal side effects.