I-scan optical enhancement for the in vivo prediction of diminutive colorectal polyp histology: Results from a prospective three-phased multicentre trial

PloS One
Entcho KlenskeTimo Rath

Abstract

Dye-less chromoendoscopy is an emerging technology for colorectal polyp characterization. Herein, we investigated whether the newly introduced I-scan optical enhancement (OE) can accurately predict polyp histology in vivo in real-time. In this prospective three-phased study, 84 patients with 230 diminutive colorectal polyps were included. During the first two study phases, five endoscopists assessed whether analysis of polyp colour, surface and vascular pattern under i-scan OE can differentiate in vivo between adenomatous and hyperplastic polyps. Finally, junior and experienced endoscopists (JE, EE, each n = 4) not involved in the prior study phases made a post hoc diagnosis of polyp histology using a static i-scan OE image database. Histopathology was used as a gold-standard in all study phases. The overall accuracy of i-scan OE for histology prediction was 90% with a sensitivity, specificity, positive (PPV) and negative prediction value (NPV) of 91%, 90%, 86% and 94%, respectively. In high confidence predictions, the diagnostic accuracy increased to 93% with sensitivity, specificity, PPV and NPV of 94%, 91%, 89% and 96%. Colonoscopy surveillance intervals were predicted correctly in ≥ 90% of patients. In the post hoc analysis...Continue Reading

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Citations

Aug 19, 2020·Digestive Diseases and Sciences·Jong Yoon LeeJong Hoon Lee
Feb 13, 2019·Current Treatment Options in Gastroenterology·Roupen DjinbachianDaniel von Renteln
May 21, 2019·Journal of Clinical Gastroenterology·Ben GloverNisha Patel
Feb 29, 2020·Visceral Medicine·Timo RathMarkus F Neurath

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Methods Mentioned

BETA
biopsy

Software Mentioned

ASGE
ASGE PIVI

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