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Pityriasis rotunda in childhood
1Institute of Dermatology, University of Sassari, Sassari, Italy.
Pediatric Dermatology
|June 6, 2002
Summary
Pityriasis rotunda, a rare skin condition, presents as round patches. Type II, common in Sardinia, appears genetically determined and resolves spontaneously in adulthood.
Area of Science:
- Dermatology
- Genetics
- Epidemiology
Background:
- Pityriasis rotunda is a rare dermatosis presenting as round, scaly patches.
- Two types exist: Type I (older patients, systemic associations) and Type II (younger patients, familial).
- A high prevalence of Type II pityriasis rotunda has been noted in Sardinia.
Purpose of the Study:
- To investigate the characteristics of pityriasis rotunda cases observed in Sardinia.
- To explore the potential genetic basis of Type II pityriasis rotunda.
Main Methods:
- Retrospective analysis of 51 cases of pityriasis rotunda from 1981-1998.
- Clinical observation and epidemiological data collection.
Main Results:
- 51 cases were observed, with 32 being children.
- A significant number of familial cases were identified.
- The disease showed a trend towards spontaneous resolution after age 20.
Conclusions:
- Type II pityriasis rotunda on Sardinia likely represents a genetically determined disorder.
- It is suggested to be a genodermatosis with a temporary phenotypic expression.
- The findings support a distinct genetic etiology for pityriasis rotunda in this population.
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