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Summary
Phototherapy (UV light) effectiveness varies for parapsoriasis types. Parapsoriasis guttata responds well to UVA therapy, while other forms like pityriasis lichenoides et varioliformis and parapsoriasis en plaques show higher relapse rates and require higher UVA doses.
Area of Science:
- Dermatology
- Photobiology
Context:
- Parapsoriasis encompasses several chronic skin conditions.
- Treatment options like phototherapy are explored for managing these conditions.
Purpose:
- To evaluate the efficacy of phototherapy, specifically UVA therapy, across different subtypes of parapsoriasis.
- To compare treatment response and relapse rates among parapsoriasis guttata, pityriasis lichenoides et varioliformis acuta, and parapsoriasis en plaques.
Summary:
- Sixty-nine patients with parapsoriasis subtypes received phototherapy.
- Parapsoriasis guttata showed a positive response to UVA therapy.
- Pityriasis lichenoides et varioliformis acuta required higher UVA doses with increased relapse probability.
- Parapsoriasis en plaques demonstrated a high relapse rate, with 63.2% experiencing recurrence within 7 months.
Impact:
- Phototherapy is a viable treatment for parapsoriasis guttata.
- Management of pityriasis lichenoides et varioliformis acuta and parapsoriasis en plaques presents challenges due to high relapse rates.
- Long-term remission exceeding one year was achieved in a minority of patients (18/69).