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Pityriasis rotunda: two cases in black Americans
Journal of the American Academy of Dermatology
|January 1, 1986
Summary
Pityriasis rotunda, a rare skin condition with circular scaling plaques, is often linked to acquired ichthyosis. This study highlights its occurrence in Black Americans, expanding its known demographic.
Area of Science:
- Dermatology
- Cutaneous Medicine
- Ichthyosis Research
Background:
- Pityriasis rotunda is an uncommon skin disorder characterized by asymptomatic, circular, scaling plaques.
- Histopathology typically resembles ichthyosis vulgaris, suggesting it's a form of acquired ichthyosis.
- Previously reported cases were predominantly observed in Japanese and South African Bantu populations.
Purpose of the Study:
- To report the first cases of pityriasis rotunda in American patients.
- To broaden the understanding of the demographic distribution of pityriasis rotunda.
- To contribute to the literature on acquired ichthyosis variants.
Main Methods:
- Clinical case reporting.
- Dermatopathological examination of skin lesions.
- Review of existing literature on pityriasis rotunda.
Main Results:
- Two cases of pityriasis rotunda were identified in Black American individuals.
- The clinical presentation and histopathological findings were consistent with previous descriptions.
- These cases represent a novel occurrence within the American population.
Conclusions:
- Pityriasis rotunda can occur in Black Americans, challenging previous geographic and ethnic restrictions.
- This finding expands the known spectrum of pityriasis rotunda presentation.
- Further research is warranted to understand the prevalence and potential associations in diverse populations.