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Nailfold capillaroscopy in myositis: A case series
Thaisa Cotton1,2, Marie Hudson1,2,3, Yves Troyanov4
1Department of Medicine, McGill University, Montreal, QC, Canada.
SAGE Open Medical Case Reports
|June 30, 2025
Summary
Nailfold capillaroscopy can diagnose myositis, a connective tissue disease, even without Raynaud's phenomenon. This noninvasive tool aids non-rheumatologists in identifying early signs of myositis.
Area of Science:
- Rheumatology
- Dermatology
- Internal Medicine
Background:
- Nailfold capillaroscopy is a diagnostic tool for systemic sclerosis.
- Scleroderma-like nailfold capillaroscopy patterns can occur in other connective tissue diseases like myositis.
- Myositis cases may initially present to non-rheumatology subspecialists.
Observation:
- Four cases of myositis are presented where nailfold capillaroscopy aided diagnosis.
- These cases initially presented to non-rheumatology subspecialists.
- Capillaroscopy identified scleroderma or scleroderma-like patterns.
Findings:
- Nailfold capillaroscopy is valuable in diagnosing myositis, even without Raynaud's phenomenon.
- It is useful for diagnosing isolated interstitial lung disease and atypical rashes associated with myositis.
- Capillaroscopy helps differentiate myositis from other conditions.
Implications:
- Nailfold capillaroscopy is a noninvasive tool for early myositis work-up.
- It can assist non-specialists in diagnosing connective tissue diseases.
- This technique enhances the diagnostic capabilities for myositis presentations.
