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Related Experiment Videos

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
PubMed
Summary
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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.

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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.