Abstract
Objectives
Differences in clinical adverse outcomes (CAO) based on different intestinal stricturing definitions in Crohn’s disease (CD) are poorly documented. This study aims to compare CAO between radiological strictures (RS) and endoscopic strictures (ES) in ileal CD and explore the significance of upstream dilatation in RS.
Methods
This retrospective double-center study included 199 patients (derivation cohort, n = 157; validation cohort, n = 42) with bowel strictures who simultaneously underwent endoscopic and radiologic examinations. RS was defined as a luminal narrowing with wall thickening relative to the normal gut on cross-sectional imaging (group 1 (G1)), which further divided into G1a (without upstream dilatation) and G1b (with upstream dilatation). ES was defined as an endoscopic non-passable stricture (group 2 (G2)). Strictures met the definitions of RS (with or without upstream dilatation) and ES were categorized as group 3 (G3). CAO referred to stricture-related surgery or penetrating disease.
Results
In the derivation cohort, G1b (93.3%) had the highest CAO occurrence rate, followed by G3 (32.6%), G1a (3.2%), and G2 (0%) (p < 0.0001); the same order was found in the validation cohort. The CAO-free survival time was significantly different among the four groups (p < 0.0001). Upstream dilatation (hazard ratio, 1.126) was a risk factor for predicting CAO in RS. Furthermore, when upstream dilatation was added to diagnose RS, 17.6% of high-risk strictures were neglected.
Conclusions
CAO differs significantly between RS and ES, and clinicians should pay more attention to strictures in G1b and G3. Upstream dilatation has an important impact on the clinical outcome of RS but may not be an essential factor for RS diagnosis.
Clinical relevance statement
This study explored the definition of intestinal stricture with the greatest significance for the clinical diagnosis and prognosis of patients with CD, and consequently provided effective auxiliary information for clinicians to formulate strategies for the treatment of CD intestinal strictures.
Key Points
• The retrospective double-center study showed that clinical adverse outcome is different between radiological strictures and endoscopic strictures in CD.
• Upstream dilatation has an important impact on the clinical outcome of radiological strictures but may not be an essential factor for diagnosis of radiological strictures.
• Radiological stricture with upstream dilatation and simultaneous radiological and endoscopic stricture were at increased risk for clinical adverse outcomes; thus, closer monitoring should be considered.
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Abbreviations
- AUC:
-
Area under the receiver operating characteristic curve
- CAO:
-
Clinical adverse outcome
- CD:
-
Crohn’s disease
- CI:
-
Confidence interval
- CTE:
-
Computed tomography enterography
- ES:
-
Endoscopic stricture
- HR:
-
Hazard ratios
- IDI:
-
Integrated discrimination improvement
- MRE:
-
Magnetic resonance enterography
- RS:
-
Radiological strictures
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Acknowledgements
The authors would like to thank Zhan-sheng Lv for his assistance with analyzing and processing the data.
Funding
This study has received funding by National Natural Science Foundation of China (82070680, 82072002, 81970483, 82170537, 82270693).
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The scientific guarantor of this publication is Xue-hua Li.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Statistics and biometry
No complex statistical methods were necessary for this paper.
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Written informed consent was waived by the Institutional Review Board.
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Institutional Review Board approval was obtained (the protocol number was IIT-2021–857).
Methodology
• retrospective
• diagnostic or prognostic study
• multicenter study
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Li Shi, Yang-di Wang, and Xiao-di Shen shared the co-first authors.
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Shi, L., Wang, Yd., Shen, Xd. et al. Clinical outcome is distinct between radiological stricture and endoscopic stricture in ileal Crohn’s disease. Eur Radiol 33, 7595–7608 (2023). https://doi.org/10.1007/s00330-023-09743-5
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DOI: https://doi.org/10.1007/s00330-023-09743-5