Abstract
Objective
We investigated whether musculoskeletal ultrasonography (MSKUS) assists the diagnostic performance of the 2010 rheumatoid arthritis (RA) classification criteria.
Methods
Sixty-nine early arthritis patients were consecutively enrolled. None of the patients had been treated. In MSKUS of bilateral wrist and finger joints from 22 sites, the findings obtained by gray-scale and power Doppler (PD) assessment were graded on a semiquantitative scale from 0 to 3. Plain magnetic resonance imaging (MRI) of both wrist and finger joints was also examined. Diagnosis of RA was defined by the initiation of disease-modifying antirheumatic drugs within the first 3 months. The diagnostic performance of the patients was evaluated at entry using 2010 RA classification criteria in conjunction with MSKUS.
Results
The indispensable MSKUS finding for differentiating RA was the presence of a PD grade 2 or 3 that was superior to 2010 RA classification criteria or MRI-proven bone edema. We propose that the decision tree algorithm of 2010 RA classification criteria with PD grade 2 or 3 reveals the best discriminative ability.
Conclusion
MSKUS, especially with a strong PD signal, is very useful to assist the diagnostic performance of the 2010 RA classification criteria in the early recognition of RA.
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Abbreviations
- ACPA:
-
Anticyclic citrullinated peptide antibody
- ACR:
-
American College of Rheumatology
- CRP:
-
C-reactive protein
- DMARDs:
-
Disease-modifying antirheumatic drugs
- ESR:
-
Erythrocyte sedimentation rate
- EULAR:
-
European League Against Rheumatism
- Gd-DTPA:
-
Gadolinium-diethylenetriamine pentaacetic acid
- GS:
-
Gray-scale
- IP:
-
Interphalangeal
- MCP:
-
Metacarpophalangeal
- MMP:
-
Matrix metalloproteinase
- MRI:
-
Magnetic resonance imaging
- MSKUS:
-
Musculoskeletal ultrasonography
- NPV:
-
Negative predictive value
- PD:
-
Power Doppler
- PIP:
-
Proximal interphalangeal
- PPV:
-
Positive predictive value
- RA:
-
Rheumatoid arthritis
- RF:
-
Rheumatoid factor
- SJC:
-
Swollen joint counts
- T2T:
-
Treat to target
- TJC:
-
Tender joint counts
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Kawashiri, Sy., Suzuki, T., Okada, A. et al. Musculoskeletal ultrasonography assists the diagnostic performance of the 2010 classification criteria for rheumatoid arthritis. Mod Rheumatol 23, 36–43 (2013). https://doi.org/10.1007/s10165-012-0628-7
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DOI: https://doi.org/10.1007/s10165-012-0628-7