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Acral pityriasis lichenoides.

Steven Kossard1

  • 1Skin and Cancer Foundation Australia, Sydney, New South Wales, Australia. skossard@scfa.edu.au

The Australasian Journal of Dermatology
|March 1, 2002
PubMed
Summary
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This study describes a rare variant of pityriasis lichenoides presenting as localized, polymorphic papulosquamous lesions on the feet and ankles. The condition may be under-recognized due to its resemblance to other skin disorders like psoriasis.

Area of Science:

  • Dermatology
  • Histopathology

Background:

  • Pityriasis lichenoides is a spectrum of inflammatory skin conditions.
  • Acrally located papulosquamous lesions can present diagnostic challenges.

Observation:

  • Two patients exhibited persistent, polymorphic papulosquamous lesions localized to the feet and ankles.
  • Lesions mimicked pityriasis lichenoides morphologically but remained localized for years.

Findings:

  • Histopathological examination of skin biopsies confirmed features of pityriasis lichenoides.
  • Specific findings included syringotropic lymphocytes and early syringolymphoid hyperplasia in one case.

Implications:

  • This rare variant of pityriasis lichenoides may be frequently misdiagnosed.

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  • Increased awareness is needed to differentiate it from conditions like psoriasis.