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Lupus erythematosus-associated red lunula.
U Wollina1, U Barta, C Uhlemann
1Department of Dermatology, Institute of Physical Therapy, Friedrich-Schiller-University of Jena, Germany.
Journal of the American Academy of Dermatology
|August 25, 1999
Summary
Red lunulae, a nail finding, appear in nearly 20% of lupus erythematosus patients. This symptom is often linked to other lupus-related skin conditions like periungual erythema.
Area of Science:
- Dermatology
- Rheumatology
- Nail Diseases
Background:
- Red lunulae are infrequently documented in individuals with lupus erythematosus.
- This study investigates a less common dermatological sign in lupus patients.
Purpose of the Study:
- To determine the prevalence of red lunulae in patients diagnosed with lupus erythematosus.
- To categorize the types of red lunulae observed in these patients.
- To explore associations between red lunulae and lupus erythematosus subtypes.
Main Methods:
- A cohort of 56 patients with established lupus erythematosus (systemic or cutaneous) was examined.
- The presence and type of red lunulae were systematically assessed.
- Clinical data, including lupus subtype and associated symptoms, were collected.
Main Results:
- Red lunulae were identified in 11 out of 56 lupus erythematosus patients (19.6%).
- All observed red lunulae were of the 'complete' type, affecting either all or a single fingernail.
- Red lunulae were associated with symptomatic lupus, shorter disease duration, and the presence of periungual erythema or chilblain lupus.
Conclusions:
- Red lunulae, despite rare literature reports, are a notable finding in a significant minority of lupus erythematosus cases.
- The presence of red lunulae may indicate associated conditions such as periungual erythema or chilblain lupus.
- Clinicians should consider red lunulae as part of the broader clinical presentation of lupus erythematosus.