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Beyond the Herald Patch: Exploring the Complex Landscape of Pityriasis Rosea
Kayla D Mashoudy1, Sarah Kim2, Leah Farhadi2
1Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA. kmashoudy@med.miami.edu.
American Journal of Clinical Dermatology
|January 11, 2025
Summary
Pityriasis rosea (PR) is a common skin rash with an unknown cause, possibly linked to human herpesviruses (HHV). This review explores its pathogenesis, treatments, and the need for further research into atypical cases.
Area of Science:
- Dermatology
- Virology
- Immunology
Background:
- Pityriasis rosea (PR) is a common, self-limiting skin condition.
- Characterized by a herald patch and a "Christmas tree" rash pattern.
- Etiology remains uncertain, with viral and immune factors implicated.
Purpose of the Study:
- To review current understanding of Pityriasis rosea pathogenesis.
- To evaluate infectious and non-infectious etiological hypotheses.
- To examine treatment options and identify research gaps.
Main Methods:
- Literature review of Pityriasis rosea.
- Analysis of epidemiological data.
- Evaluation of proposed pathogenetic mechanisms, including viral reactivation and immune responses.
Main Results:
- Human herpesviruses (HHV) 6 and 7 are potential triggers.
- Epidemiological data suggests an infectious component with global variations.
- Atypical presentations and recurrences pose diagnostic challenges.
Conclusions:
- Further research is essential to elucidate PR etiology.
- Clarifying pathogenesis will aid in developing targeted therapies.
- Evaluating treatment efficacy for atypical and recurrent PR is crucial.
