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Genetic and Rare Diseases Information Center (GARD)

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Pityriasis lichenoides chronica

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Pityriasis lichenoides chronica is the mild, chronic form of pityriasis lichenoides, a skin disorder of unknown cause. This condition is characterized by the gradual development of symptomless, small, scaling papules that spontaneously flatten and regress over a period of weeks or months. Lesions at various stages may be present at any one time. Patients with this condition often have exacerbations and relapses of the condition, which can last for months or years.[1]
Last updated: 4/30/2010


  1. Pityriasis lichenoides. DermNet NA. February 2010; Accessed 4/30/2010.
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Basic Information

  • The British Association of Dermatologists provides an informational leaflet on pityriasis lichenoides.  Click on the British Association of Dermatologists link to view this leaflet.
  • DermNet NZ is an online resource about skin diseases developed by the New Zealand Dermatological Society Incorporated. DermNet NZ provides information about this condition.

In Depth Information

  • Medscape Reference provides information on this topic. Click on the link to view this information. You may need to register to view the medical textbook, but registration is free.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Pityriasis lichenoides chronica. Click on the link to view a sample search on this topic.