Bowel Stiffness Assessed by Shear-wave Ultrasound Elastography Predicts Disease Behavior Progression in Patients with Crohn’s Disease

Author:

Chen Yu-Jun1,He Jin-Shen2,Xiong Shan-Shan2,Li Man-Ying1,Chen Shu-Ling1,Chen Bai-Li2,Qiu Yun2,Xia Qing-Qing1,He Yao2,Zeng Zhi-Rong2,Chen Min-Hu2,Xie Xiao-Yan1,Mao Ren2

Affiliation:

1. Department of Medical Ultrasonics

2. Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.

Abstract

Objectives: There is a lack of reliable predictors of disease behavior progression in patients with Crohn’s disease (CD). Real-time shear-wave elastography (SWE) is a novel method for evaluating tissue stiffness. However, its value for assessing CD has not yet been investigated. We aimed to explore the value of SWE and other ultrasound parameters at diagnosis in predicting CD behavior progression. Methods: We retrospectively collected data from CD patients with the non-stenotic non-penetrating disease (B1 phenotype based on the Montreal classification). All patients underwent intestinal ultrasound at baseline and were followed up. The endpoint was defined as disease behavior progression to stricturing (B2) or penetrating (B3) disease. Cox regression analysis was performed for the association between baseline characteristics and subsequent endpoints. Additionally, a multivariate nomogram was established to predict the risk of disease behavior progression quantitatively. Results: A total of 130 CD patients with B1 phenotype were enrolled. Twenty-seven patients (20.8%) developed B2 or B3 disease, with a median follow-up of 33 months. Multivariate analysis identified that SWE was the only independent predictor of disease behavior progression (HR 1.08, 95% CI 1.03–1.12, P=0.001). A reverse of the hazard ratio appeared at the cut-off 12.75 kPa. The nomogram incorporating SWE and other clinical characteristics showed a good prediction performance (AUC=0.792). Conclusions: Intestinal stiffness assessed using SWE is an independent predictor of disease behavior progression in patients with CD. CD patients with SWE >12.75 kPa at diagnosis are prone to progress toward stricturing or penetrating diseases.

Funder

National Natural Science Foundation of China

Publisher

Ovid Technologies (Wolters Kluwer Health)

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