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Pityriasis rotunda in childhood.

P Ena1, D Cerimele

  • 1Institute of Dermatology, University of Sassari, Sassari, Italy.

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Summary
This summary is machine-generated.

Pityriasis rotunda, a rare skin condition, presents as round patches. Type II, common in Sardinia, appears genetically determined and resolves spontaneously in adulthood.

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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.