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Updated: Aug 27, 2025
Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
Published on: May 16, 2025
Risk factors of progression from discoid lupus to severe systemic lupus erythematosus: a registry-based cohort study
Lisa Fredeau1, Delphine S Courvoisier2, Raphael Ait Mehdi3
1Sorbonne Université, Faculté de médecine, AP-HP, Service de Dermatologie et Allergologie, Hôpital Tenon, Paris, France.
Insights
Younger age at discoid lupus erythematosus (DLE) diagnosis, darker skin types (phototype V-VI), and high antinuclear antibody (ANA) titers are key risk factors for progression to severe systemic lupus erythematosus (sSLE). A predictive score can identify at-risk patients.
Area of Science:
- Dermatology
- Rheumatology
- Immunology
Background:
- Discoid lupus erythematosus (DLE) is a chronic skin condition, but its progression to severe systemic lupus erythematosus (sSLE) is not well understood.
- Risk factors for DLE transitioning to sSLE, a serious form requiring hospitalization and specific treatments, have not been previously identified.
Purpose of the Study:
- To pinpoint risk factors associated with DLE progression to sSLE.
- To develop a predictive scoring system for sSLE development in DLE patients.
Main Methods:
- A registry-based cohort study was conducted.
- Multivariable analysis, including backward selection, identified significant risk factors from existing literature.
- A predictive score was generated, weighting points proportionally to the odds ratio (OR) of identified risk factors.
Main Results:
- The study identified three significant risk factors for sSLE progression: age under 25 at DLE diagnosis (OR 2.8), phototype V-VI (OR 2.7), and antinuclear antibody (ANA) titers ≥1:320 (OR 15).
- A scoring system was developed: <25 years (1 point), phototype V-VI (1 point), and ANA ≥1:320 (5 points).
- Patients with a baseline score of 0 showed no progression, while a score of ≥6 indicated approximately a 40% risk of developing sSLE.
Conclusions:
- Age at diagnosis, skin phototype, and ANA titers are crucial indicators for sSLE development in DLE patients.
- The developed predictive score effectively stratifies risk for sSLE progression.
- This research provides a valuable tool for early identification and management of DLE patients at high risk for systemic involvement.
Background:
No study has assessed the risk factors of progression from discoid lupus erythematosus (DLE) to severe systemic lupus erythematosus (sSLE) (defined as requiring hospitalization and specific treatment).
Objective:
To identify the risks factors of and generate a predicting score for progression to sSLE among patients with isolated DLE or associated with systemic lupus erythematosus with mild biological abnormalities.
Methods:
In this registry-based cohort study, multivariable analysis was performed using risk factors identified from literature and pruned by backward selection to identify relevant variables. The number of points was weighted proportionally to the odds ratio (OR).
Results:
We included 30 patients with DLE who developed sSLE and 134 patients who did not. In multivariable analysis, among 12 selected variables, an age of <25 years at the time of DLE diagnosis (OR, 2.8; 95% CI, 1.1-7.0; 1 point), phototype V to VI (OR, 2.7; 95% CI, 1.1-7.0; 1 point), and antinuclear antibody titers of ≥1:320 (OR, 15; 95% CI, 3.3-67.3; 5 points) were selected to generate the score. Among the 54 patients with a score of 0 at baseline, none progressed to sSLE, whereas a score of ≥6 was associated with a risk of approximately 40%.
Limitations:
Retrospective design.
Conclusion:
In our cohort, an age of <25 years at the time of DLE diagnosis, phototype V to VI, and antinuclear antibody titers of ≥1:320 were risk factors for developing sSLE.
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