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Photosensitive psoriasis.

A M Ros1

  • 1Department of Dermatology, Karolinska Hospital, Stockholm, Sweden.

Seminars in Dermatology
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

Photosensitive psoriasis, affecting 5.5% of psoriasis patients, is linked to specific patient characteristics and sun exposure. Photochemotherapy offers an effective treatment for this condition.

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Area of Science:

  • Dermatology
  • Photobiology

Background:

  • Photosensitive psoriasis is a rare condition, affecting an estimated 5.5% of all psoriasis patients.
  • Patients with photosensitive psoriasis often exhibit specific traits, including skin type I, a family history of photosensitivity, advanced age, and hand involvement.

Purpose of the Study:

  • To characterize the clinical features and presentation patterns of photosensitive psoriasis.
  • To identify factors associated with photosensitive psoriasis.
  • To evaluate treatment efficacy for photosensitive psoriasis.

Main Methods:

  • Retrospective analysis of patient data.
  • Clinical assessment of skin type, heredity, age, and affected body areas.
  • Phototesting to confirm reaction patterns.
  • Review of treatment outcomes.

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Main Results:

  • Photosensitive psoriasis is associated with skin type I, hereditary photosensitivity, older age, and hand psoriasis.
  • Approximately 50% of patients develop psoriasis secondary to polymorphous light eruption (PLE).
  • The remaining 50% develop psoriasis gradually after sun exposure without preceding PLE.

Conclusions:

  • Photosensitive psoriasis presents distinct clinical characteristics and reaction patterns to light exposure.
  • Phototesting can help differentiate between types of photosensitive psoriasis reactions.
  • Photochemotherapy is an effective therapeutic option for managing photosensitive psoriasis.