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CC BY-NC-ND 4.0 · Endosc Int Open 2020; 08(10): E1414-E1422
DOI: 10.1055/a-1165-0169
Original article

Modified Kudo classification can improve accuracy of virtual chromoendoscopy with FICE in endoscopic surveillance of ulcerative colitis

Andrea Cassinotti
1   Gastroenterology Unit, ASST Fatebenefratelli Sacco, Milan, Italy
2   ASST Sette Laghi, Varese (Italy)
,
Paolo Fociani
3   Pathology Unit, ASST Fatebenefratelli Sacco, Milan, Italy
,
Piergiorgio Duca
4   Chair of Statistics, University of Milan, Milan, Italy
,
Manuela Nebuloni
3   Pathology Unit, ASST Fatebenefratelli Sacco, Milan, Italy
,
Sophia Elizabeth Campbell Davies
5   Pharmacy Service - Fatebenefratelli e Oftalmico Hospital, Milan, Italy
,
Gianluca Sampietro
6   IBD Surgery Unit, ASST Fatebenefratelli Sacco, Milan, Italy
,
Federico Buffoli
7   Endoscopy Unit, ASST Cremona, Cremona, Italy
,
Alberto Corona
8   Intensive Care Unit, ASST Fatebenefratelli Sacco, Milan, Italy
,
Giovanni Maconi
1   Gastroenterology Unit, ASST Fatebenefratelli Sacco, Milan, Italy
,
Sandro Ardizzone
1   Gastroenterology Unit, ASST Fatebenefratelli Sacco, Milan, Italy
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Abstract

Background and study aims Virtual chromoendoscopy with Fuji Intelligent Color Enhancement (FICE) has never been studied in prospective trials of endoscopic surveillance for ulcerative colitis (UC). We compared FICE and white light endoscopy (WLE) in differentiation of visible lesions in UC.

Patients and methods In a prospective parallel study, we compared consecutive outpatients with UC submitted to surveillance colonoscopy with FICE or WLE. At least one visible polypoid or non-polypoid lesion for each patient was required. Random biopsies from normal mucosa, targeted biopsies or removal of suspected neoplastic lesions and targeted biopsies of unsuspected lesions were performed. In the FICE arm, neoplasia was suspected according to a modified Kudo classification (FICE-KUDO/inflammatory bowel disease [IBD]). Sensitivity (SE), specificity (SP), positive and negative likelihood ratios (LR) and negative predictive value (NPV) were analyzed.

Results One hundred patients were submitted to FICE (n = 46) or WLE (n = 54). Twenty-two patients (11 in WLE, 11 in FICE) had a least one neoplastic lesion. No neoplasia was found in random biopsies. Among 275 lesions, 17 of 136 by FICE and 27 of 139 by WLE were suspected neoplasia, but 28 (14 in each arm) were true neoplastic lesions. The accuracy of FICE-KUDO/IBD vs WLE (per lesion) was: SE 93 % vs 64 % (P = 0.065), SP 97 % vs 86 % (P = 0.002), positive-LR 28.3 vs 4.5 (P = 0.001), negative-LR 0.07 vs 0.42 (P = 0.092), NPV 99 % vs 96 % (P = 0.083). FICE-KUDO/IBD detected more non-polypoid lesions than WLE (P = 0.016).

Conclusions Targeted biopsies of polypoid and non-polypoid lesions, using the modified Kudo classification with FICE are more accurate than WLE in UC surveillance.



Publication History

Received: 05 September 2019

Accepted: 06 April 2020

Article published online:
22 September 2020

© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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