Clinical Scorecard: Assessment of Terminal Ileal Crohn's Disease Volume Using Magnetic Resonance Enterography: A Feasibility Investigation
At a Glance
Category
Detail
Condition
Terminal ileal Crohn's disease (CD)
Key Mechanisms
Volumetric measurement of bowel wall inflammation using magnetic resonance enterography (MRE) to assess disease activity and treatment response
Target Population
Adults (≥18 years) with suspected or known Crohn's disease involving the terminal ileum
Care Setting
Hospital-based radiology and gastroenterology services with access to MRE and endoscopy
Key Highlights
Endoscopy is the gold standard for CD activity assessment but is invasive and limited in evaluating transmural and proximal disease.
MRE is validated for CD activity assessment but current scoring relies on single 2D bowel wall thickness measurements rather than volumetric evaluation.
Volumetric MRE assessment of terminal ileal CD is technically feasible and may provide a more robust biomarker for disease burden and treatment response.
Guideline-Based Recommendations
Diagnosis
Use MRE as a non-invasive imaging modality to complement endoscopy for assessing Crohn's disease activity, especially for transmural and proximal bowel involvement.
Consider volumetric assessment of bowel wall inflammation on MRE to better quantify disease burden.
Management
Employ volumetric MRE measurements to monitor treatment response, particularly in patients receiving biologic therapy.
Aim for transmural healing as an alternative treatment target to mucosal healing, assessed via cross-sectional imaging.
Monitoring & Follow-up
Perform serial MRE volumetric assessments to evaluate changes in disease volume and activity over time.
Use standardized protocols and trained radiologists to improve reproducibility of volumetric measurements.
Risks
Recognize that MRE interpretation can be subjective with moderate interobserver variability; volumetric methods may reduce this variability.
Be aware of contraindications to MRE and ensure adequate bowel preparation for accurate imaging.
Patient & Prescribing Data
Adults with terminal ileal Crohn's disease undergoing biologic therapy
Volumetric MRE measurements may help differentiate responders from non-responders to biologic treatment by quantifying changes in disease volume.
Clinical Best Practices
Use a standardized MRE protocol and software tools for volumetric analysis to ensure consistency.
Have experienced abdominal radiologists perform centreline placement and manual segmentation of diseased bowel segments.
Correlate volumetric MRE findings with endoscopic scores (e.g., CDEIS) and validated MRE activity indices (e.g., sMARIA) for comprehensive assessment.
Incorporate volumetric assessment into routine imaging evaluation to enhance sensitivity for detecting disease activity and treatment response.
by Shankar Kumar, Nikhil Rao, Anisha Bhagwanani, Thomas Parry, Maira Hameed, Safi Rahman, Heather E. Fitzke, Judith Holmes, Benjamin Barrow, Andrew Bard, Alex Menys, David Bennett, Sue Mallett, Stuart A. Taylor
