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[Lichen planus/lupus erythematosus overlap syndrome]
R Cecchi1, L Brunetti, G Troiano
1Divisione Dermatologica, Ospedali Riuniti, Pistoia.
Summary
This case report details a patient with discoid lupus erythematosus (DLE) and lichen planus (LP). Direct immunofluorescence findings suggested LP, despite distinct histopathology for DLE and LP.
Area of Science:
- Dermatology
- Immunopathology
Background:
- Discoid lupus erythematosus (DLE) and lichen planus (LP) are distinct inflammatory skin conditions.
- Co-occurrence of DLE and LP in a single patient presents diagnostic challenges.
Observation:
- A patient presented with facial DLE-like lesions and LP-like lesions on the arms.
- Histopathology confirmed typical DLE on the face and LP on the hand.
- Direct immunofluorescence (DIF) studies were performed on both facial and hand lesions.
Findings:
- Histopathology revealed distinct features of DLE and LP in the respective biopsy sites.
- However, DIF findings for both facial (DLE) and hand (LP) lesions were predominantly indicative of lichen planus.
- This discrepancy highlights potential complexities in interpreting DIF in cases with overlapping clinical and histopathological features.
Implications:
- The findings suggest that DIF may not always be definitive in differentiating DLE from LP when clinical and histopathological features are mixed.
- This case underscores the importance of integrating clinical presentation, histopathology, and DIF results for accurate diagnosis.
- Further research may be warranted to understand the immunopathological mechanisms underlying such presentations.