Early Intestinal Ultrasound Assessment Predicts Therapy Response: An Easy Tool for Clinical Decision-Making.

Area of Science:

• Gastroenterology
• Inflammatory Bowel Disease
• Medical Imaging

Background:

• Transmural healing (TH) is a key therapeutic goal in Crohn's disease (CD), indicating deeper remission than mucosal healing.
• Intestinal ultrasound (IUS) offers a noninvasive method to assess TH, but its predictive capabilities require further definition.

Purpose of the Study:

• To determine if early changes in IUS parameters during biological therapy can predict TH at 12 months.
• To evaluate the prognostic value of IUS in managing Crohn's disease.

Main Methods:

• Prospective multicenter study of 142 CD patients initiating biological therapies.
• IUS and Doppler parameters assessed at baseline, 3 months, and 12 months.
• Delta (Δ) changes in ultrasound measurements from baseline to 3 months calculated; TH defined by normalized bowel wall and absent hypervascularization.

Main Results:

• At 12 months, 19% achieved TH and 44% showed IUS response.
• Significant ΔBWT reduction predicted TH (73% sensitivity, 61% specificity for 1.25 mm reduction).
• Combined ΔBWT and Limberg score improvement strongly predicted both TH (OR 13.26) and IUS response (OR 20.9) at 12 months.

Conclusions:

• Early reduction in bowel wall thickness (BWT) is a significant predictor of TH and IUS response in CD patients.
• The combination of ΔBWT and Limberg score offers robust prediction of deep remission.
• Early IUS monitoring is supported for clinical practice in managing Crohn's disease.