# Surveillance in Ulcerative Colitis: Narrow Band Image Versus Chromoendoscopy for High-risk Groups

> **NCT04257084** · NA · UNKNOWN · sponsor: **Asan Medical Center** · enrollment: 188 (estimated)

## Conditions studied

- Ulcerative Colitis
- Dysplasia

## Interventions

- **DIAGNOSTIC_TEST:** chromoendoscopy with target biopsy; NBI with target biopsy

## Key facts

- **NCT ID:** NCT04257084
- **Lead sponsor:** Asan Medical Center
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2020-12
- **Primary completion:** 2022-08
- **Final completion:** 2023-01
- **Target enrollment:** 188 (ESTIMATED)
- **Last updated:** 2020-11-24

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04257084

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04257084, "Surveillance in Ulcerative Colitis: Narrow Band Image Versus Chromoendoscopy for High-risk Groups". Retrieved via AI Analytics 2026-06-05 from https://api.ai-analytics.org/clinical/NCT04257084. Licensed CC0.

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