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Primary annular plaque-type psoriasis
Carrie Lynn Guill1, Mai P Hoang, K Robin Carder
1Department of Dermatology, University of Texas Southwestern Medical School, Dallas, Texas 75390-9069, USA.
Pediatric Dermatology
|January 22, 2005
Summary
This study details a rare form of plaque-type psoriasis presenting as annular lesions in adolescents. This unique presentation, distinct from typical psoriasis, responded well to combination therapy.
Area of Science:
- Dermatology
- Immunodermatology
Background:
- Psoriasis vulgaris typically presents as well-demarcated erythematous plaques with silvery scales.
- Annular lesions with central clearing are uncommon in plaque-type psoriasis and can be mistaken for other dermatoses.
Purpose of the Study:
- To describe a novel presentation of psoriasis vulgaris characterized by consistently annular, plaque-type lesions without pustules in adolescent patients.
- To investigate the clinical and histopathological features of this rare psoriasis variant.
Main Methods:
- Case report describing two adolescent females with untreated annular plaque-type psoriasis.
- Clinical examination, photographic documentation, and histopathological analysis of skin biopsy specimens.
- Assessment of treatment response to combination therapy.
Main Results:
- Two adolescent girls presented with untreated, annular, plaque-type psoriasis lacking typical confluent lesions or pustules.
- Histopathology confirmed features consistent with psoriasis vulgaris.
- Both patients achieved significant improvement with combination therapy of calcipotriene and a mid-potency topical steroid.
Conclusions:
- Primary annular plaque-type psoriasis is a distinct clinical presentation not previously described.
- This variant shares characteristics with both typical plaque-type psoriasis and annular pustular psoriasis.
- The findings suggest that different psoriatic disease presentations may exist on a disease spectrum.