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Dermatitis Herpetiformis: Novel Perspectives.

Emiliano Antiga1, Roberto Maglie1, Lavinia Quintarelli1

  • 1Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy.

Frontiers in Immunology
|June 28, 2019
PubMed
Summary
This summary is machine-generated.

Dermatitis herpetiformis (DH), a skin condition linked to celiac disease (CD), presents with itchy rashes and may have atypical presentations. Diagnostic criteria may need revision, emphasizing clinical and immunopathologic findings for accurate diagnosis and management.

Keywords:
coeliac diseasedermatitis herpetiformisdirect immunofluorescenceepidermal transglutaminasenon-coeliac gluten sensitivity

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Area of Science:

  • Immunodermatology
  • Gastroenterology
  • Genetics

Background:

  • Dermatitis herpetiformis (DH) is the specific skin manifestation of celiac disease (CD), affecting gluten-sensitive individuals.
  • Both conditions share Human Leukocyte Antigen (HLA) DQ2/DQ8 haplotypes and improve with a gluten-free diet.
  • DH patients typically exhibit small intestinal alterations and develop autoantibodies against tissue transglutaminase (tTG).

Purpose of the Study:

  • To review novel pathogenic insights, diagnostic controversies, and management strategies for Dermatitis herpetiformis.
  • To discuss the evolving understanding of DH, including atypical presentations and potential changes in incidence.
  • To evaluate the diagnostic utility of autoantibodies against epidermal transglutaminase (eTG) and direct immunofluorescence (DIF) findings.

Main Methods:

  • Literature review of pathogenic insights, clinical presentations, and diagnostic methods for DH.
  • Analysis of histopathologic and immunopathologic findings, including direct immunofluorescence (DIF).
  • Assessment of serological markers such as anti-tTG and anti-eTG antibodies.

Main Results:

  • DH presents with polymorphic, intensely pruritic lesions symmetrically on extensor surfaces, elbows, sacrum, and buttocks.
  • Atypical DH presentations and variations in intestinal/serological involvement (especially in non-Caucasian populations) are increasingly reported.
  • Granular IgA deposits on DIF are specific, but similar findings can occur in other celiac-associated skin conditions, questioning the sole diagnostic role of eTG antibodies.

Conclusions:

  • DH diagnosis relies on a combination of clinical, histopathologic, and immunopathologic findings.
  • Diagnostic criteria for DH may require revision, potentially prioritizing clinical presentation alongside DIF.
  • Management typically involves a gluten-free diet, with topical corticosteroids or dapsone used for rapid symptom control.