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Photosensitive pityriasis rubra pilaris
1Royal Victoria Infirmary, Department of Dermatology, London, UK.
Clinical and Experimental Dermatology
|November 29, 2005
Summary
Pityriasis rubra pilaris (PRP) can be worsened by UV light. This case highlights PRP initially appearing on sun-exposed skin, confirmed by UV sensitivity testing.
Area of Science:
- Dermatology
- Photobiology
Background:
- Pityriasis rubra pilaris (PRP) is a rare chronic skin disorder.
- UV radiation is a known factor in PRP exacerbation.
Observation:
- This case presented with PRP lesions in a photoexposed distribution.
- The initial presentation was unusual, with lesions primarily on sun-exposed areas.
Findings:
- Phototesting confirmed significant ultraviolet (UV) sensitivity in the patient.
- Sensitivity was particularly pronounced to the UVB spectrum, consistent with other reported cases.
Implications:
- This case underscores the importance of considering photosensitivity in PRP diagnosis.
- Understanding UV sensitivity in PRP can guide patient management and treatment strategies.