Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/10/2025

Pityriasis Conditions

Clinical Characteristics

  • Pityriasis Alba is a common hypopigmented condition, particularly in children, appearing as pale patches with fine scale, and is often considered in the differential diagnosis of vitiligo 1
  • Pityriasis Versicolor is a common fungal infection caused by Malassezia species, presenting as hyperpigmented or hypopigmented macules with fine scale, and is included in the differential diagnosis of vitiligo and other depigmenting conditions 1
  • Wood's lamp examination can be helpful in the diagnosis of certain types of pityriasis, such as pityriasis versicolor 1

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