Confocal laser endomicroscopy in ulcerative colitis: beyond endoscopic assessment of disease activity.

Abstract:

BACKGROUND:The aim of this study was to investigate the role of confocal laser endomicroscopy (CLE) in the assessment of disease activity in ulcerative colitis (UC). METHODS:Consecutive patients with UC referred to our inflammatory bowel disease unit for colonoscopy were enrolled. Patients without UC were used as controls. UC activity was evaluated by white light endoscopy and classified according to the Mayo Ulcerative Colitis Endoscopic Score of Severity. Endoscopic biopsies were also taken for histological assessment of disease activity and then assessed with CLE. Three parameters were evaluated; crypt architecture (crypt diameter, inter-crypt distance, presence of fused crypts, crypts regularity), microvascular pattern (regular, dilated, irregular and deformed), fluorescein leakage. RESULTS:Fifty patients with UC and 10 controls were enrolled. At colonoscopy, 11 patients (22%), 19 patients (38%), 12 patients (24%) and 8 patients (16%) presented a Mayo score of 0, 1, 2 and 3, respectively. At CLE, fused crypts were present in all the patients with UC and absent in controls. Crypt diameter and inter-crypt distance showed a parallel increase with the Mayo score. Fluorescein leakage and irregular vessels were more frequently found in case of a high level of endoscopic severity, but were also identified in about 20% of UC patients with normal mucosa. Biopsies also demonstrated the presence of histological activity in 4 patients with endoscopically inactive colitis. CONCLUSIONS:CLE might be a useful tool to determine inflammatory activity in UC. Fused crypts appeared to be a CLE marker of UC, while other abnormalities, like microvascular alteration and fluorescein leakage, have also been identified in patients with mucosal healing at endoscopy. Larger series are required to validate these results and the advantages of a CLE-based assessment of UC activity.

journal_name

Tech Coloproctol

authors

Maione F,Giglio MC,Luglio G,Rispo A,D'Armiento M,Manzo B,Cassese G,Schettino P,Gennarelli N,Siciliano S,D'Armiento FP,De Palma GD

doi

10.1007/s10151-017-1654-4

subject

Has Abstract

pub_date

2017-07-01 00:00:00

pages

531-540

issue

7

eissn

1123-6337

issn

1128-045X

pii

10.1007/s10151-017-1654-4

journal_volume

21

pub_type

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