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Diseases

Genetic and Rare Diseases Information Center (GARD)

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Parapsoriasis


Other Names for this Disease

  • Digitate dermatosis
  • Parapsoriasis en plaque
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Overview

Parapsoriasis describes a group of skin diseases that can be characterized by scaly patches or slightly elevated papules and/or plaques (red, scaly patches) that have a resemblance to psoriasis. However, this description includes several inflammatory cutaneous diseases that are unrelated with respect to pathogenesis, histopathology, and response to treatment. Because of the variation in clinical presentation and a lack of a specific diagnostic finding on histopathology, a uniformly accepted definition of parapsoriasis remains lacking.[1]

There are 2 general forms: a small plaque type, which is usually benign, and a large plaque type, which is a precursor of cutaneous T-cell lymphoma (CTCL). Treatment of small plaque parapsoriasis is unnecessary but can include emollients, topical tar preparations or corticosteroids, and/or phototherapy. Treatment of large plaque parapsoriasis is phototherapy or topical corticosteroids.[2]
Last updated: 7/8/2014

References

  1. Wong HK. Parapsoriasis. Medscape Reference. July 2, 2014; http://emedicine.medscape.com/article/1107425-overview. Accessed 7/8/2014.
  2. Parapsoriasis. The Merck Manuals Online Medical Library. October 2012; http://www.merckmanuals.com/professional/dermatologic_disorders/psoriasis_and_scaling_diseases/parapsoriasis.html?qt=&sc=&alt=. Accessed 7/8/2014.
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Basic Information

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.
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Other Names for this Disease
  • Digitate dermatosis
  • Parapsoriasis en plaque
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.