Diagnostic accuracy of pan-enteric capsule endoscopy and magnetic resonance enterocolonography in suspected Crohn's disease

Jacob Broder Brodersen, Torben Knudsen, Jens Kjeldsen, Mie Agerbaek Juel, Søren Rafael Rafaelsen, Michael Dam Jensen, Jacob Broder Brodersen, Torben Knudsen, Jens Kjeldsen, Mie Agerbaek Juel, Søren Rafael Rafaelsen, Michael Dam Jensen

Abstract

Background and aims: Magnetic resonance enterocolonography (MREC) and pan-enteric capsule endoscopy (CE) offers visualization of the entire gastrointestinal tract in a single examination. We examined the diagnostic accuracy of MREC and CE in patients with suspected Crohn's disease (CD).

Method: In a prospective, blinded, multicenter study, we included patients with clinically suspected CD. Patients were examined with MREC, CE, and ileocolonoscopy (IC) within 2 weeks. The primary outcome was per patient sensitivity, specificity, and diagnostic accuracy for ileocolonic CD. IC served as reference standard.

Results: 153 patients were included in the study and IC, MREC, and CE was performed in 152, 151, 133 patients, respectively. CD was diagnosed with IC in 59 (39%) patients (terminal ileum (TI) 22, colon 20, TI and colon 17). The sensitivity and specificity for diagnosing ileocolonic CD with MREC was 67.9% (CI 53.7-80.1) and 76.3% (CI 65.2-85.3) (TI 76.9% and 85.6%; colon 27% and 93%) compared to 87.5% (CI 73.2-95.8) and 87.8% (CI 78.2-94.3) with CE (TI 96.6% and 87.5%; colon 75.0% and 93.0%). The sensitivity of CE was superior to that of MREC (p = 0.02). The patient experienced discomfort was equal with CE and MREC and significantly less than with IC.

Conclusion: In patients with suspected CD, CE has a high sensitivity for diagnosing CD in the TI and colon, which is superior to that of MREC. The sensitivity of MREC for diagnosing CD in the colon is poor. CE could be a patient-friendly alternative to IC in selected patients with suspected CD. Registered at ClinicalTrials.gov: NCT03134586.

Keywords: Crohn's disease; capsule endoscopy; diagnostic imaging; magnetic resonance imaging.

Conflict of interest statement

The Authors declare that there is no conflict of interest.

© 2022 The Authors. United European Gastroenterology Journal published by Wiley Periodicals LLC. on behalf of United European Gastroenterology.

Figures

FIGURE 1
FIGURE 1
Flow chart showing the number of patients entering the study and completing examinations in accordance with the study protocol

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