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Parapsoriasis (overview)L41.-

Author:Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

Pseudopsoriasis

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HistoryThis section has been translated automatically.

Brocq, 1902

DefinitionThis section has been translated automatically.

Term introduced by Brocq in 1902 as a temporary measure for various rare, chronic, unclassifiable, erythematosquamous, therapy-resistant skin diseases. The diseases of the parapsoriasis group have no nosological relationship to psoriasis and there are also no pathogenetic similarities between them.

The large-heart inflammatory parapsoriasis en plaques is to be regarded as initial cutaneous T-cell lymphoma.

The small-spot parapsoriasis is generally classified as indiopathic, benign, chronic dermatitis (some authors doubt the absolute "benignity" of small-spot parapsoriasis - see on this under Parapsoriasis en plaques benign small-spot form - and doubt an own entity).

ClassificationThis section has been translated automatically.

A distinction is made between:

TherapyThis section has been translated automatically.

S.u. parapsoriasis guttata; parapsoriasis en plaques; parapsoriasis en plaques, benign small-focus form; parapsoriasis en plaques, large-focus inflammatory form; parapsoriasis lichenoides.

LiteratureThis section has been translated automatically.

  1. Belousova IE et al (2008) A patient with clinicopathologic features of small plaque parapsoriasis presenting later with plaque-stage mycosis fungoides: report of a case and comparative retrospective study of 27 cases of "nonprogressive" small plaque parapsoriasis. J Am Acad Dermatol 59:474-482

  2. Brocq LAJ (1902) Les parapsoriasis. Ann Dermatol Syph (Paris) 3: 313-315, 433-468
  3. Costa C et al (2003) Analysis of T-cell receptor gamma gene rearrangements by PCR-Genescan and PCR-polyacrylamide gel electrophoresis in early-stage mycosis fungoides/large-plaque parapsoriasis. Dermatology 207: 418-419
  4. Erkek E et al (2002) Absence of Epstein-Barr virus and human herpesvirus-6 in pityriasis lichenoides and plaque parapsoriasis. J Eur Acad Dermatol Venereol 16: 536-537
  5. Holubar K (2003) Psoriasis and parapsoriasis: since 200 and 100 years, respectively. J Eur Acad Dermatol Venereol 17: 126-127
  6. Lewin J et al (2012) Digitate dermatosis (small-plaque parapsoriasis).
    Dermatol Online J 18:3 PubMed PMID: 23286793.

Authors

Last updated on: 29.10.2020

Author: Prof. Dr. med. Peter Altmeyer