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Early rheumatoid arthritis, two distinctive structural damage patterns revealed by MRI: an 8-year longitudinal study
Su Wu1, James Francis Griffith2, Fan Xiao1
1Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Hong Kong, China.
European Radiology
|March 19, 2025
Summary
In early rheumatoid arthritis (ERA) patients, baseline MRI bone erosion scores effectively predict long-term structural damage, outperforming clinical and serological markers. This aids in identifying distinct damage patterns for better patient outcome prediction.
Area of Science:
- Rheumatology
- Medical Imaging
- Immunology
Background:
- Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by joint damage.
- Early rheumatoid arthritis (ERA) requires accurate prognostication for effective long-term management.
- Predicting structural damage progression in ERA is crucial for tailoring treatment strategies.
Purpose of the Study:
- To evaluate long-term changes in inflammatory and structural parameters in ERA patients under standard treatment.
- To identify the baseline parameter that best predicts long-term structural damage in ERA.
- To assess the utility of MRI in differentiating structural damage patterns.
Main Methods:
- Prospective study of 81 early rheumatoid arthritis patients with symptom duration ≤ 24 months.
- Serial assessments included clinical, serological, radiographic, and dynamic contrast-enhanced MRI of the wrist at baseline, year 1, and year 8.
- MRI analysis involved semi-quantitative (RAMRIS) and quantitative (synovial volume, BME proportion) measurements; multivariate and ROC analyses were used for prediction.
Main Results:
- Inflammatory parameters (synovial volume, BME proportion) improved by year 1 but slightly worsened by year 8 (p < 0.01).
- Structural damage progressively deteriorated from baseline to year 8.
- Two distinct patterns emerged: non-progressive (62%) and progressive (38%) structural damage. Baseline MRI-detected bone erosion score (AUC=0.81) was a superior predictor of year-8 damage compared to clinical (SDAI AUC=0.61), serological (CRP AUC=0.60), or radiographic assessments (AUC=0.59).
Conclusions:
- Early rheumatoid arthritis patients exhibit two distinct long-term structural damage patterns.
- Baseline MRI bone erosion score is a more accurate predictor of long-term structural damage than clinical, serological, or radiographic assessments.
- Baseline MRI is recommended for all ERA patients to establish structural damage patterns and improve long-term outcome prediction.
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