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[Erythema multiforme. A heterogeneous pathologic phenotype].

M Carrozzo1, M Togliatto, S Gandolfo

  • 1Dipartimento di Fisiopatologia Clinica, Università degli Studi, Torino. Mcarro@tin.it

Minerva Stomatologica
|August 6, 1999
PubMed
Summary
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Erythema Multiforme (EM) encompasses a spectrum of conditions, from oral lesions to severe mucocutaneous reactions like Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN). Diagnosis relies on exclusion, with varied treatments based on the specific presentation and cause.

Area of Science:

  • Dermatology and Immunology
  • Clinical Medicine

Context:

  • Erythema Multiforme (EM) presents a spectrum of clinical manifestations, from isolated oral erosions (Oral EM) to widespread mucocutaneous lesions (EM Minor, EM Major, Stevens-Johnson syndrome [SJS], and toxic epidermal necrolysis [TEN]).
  • Current terminology is not universally standardized, leading to overlapping features among different clinical categories.
  • Etiological factors vary, with herpes simplex virus implicated in EM Minor and systemic drugs (anticonvulsants, sulfonamides, NSAIDs, antibiotics) causing most SJS/TEN cases; some oral EM cases appear idiopathic.

Purpose:

  • To review the clinical spectrum, etiological factors, diagnostic challenges, and treatment strategies for Erythema Multiforme and its severe variants.
  • To highlight the diagnostic difficulties due to the lack of specific histopathological and immunopathological markers.
  • To differentiate treatment approaches based on the severity and presumed cause of the EM spectrum.

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Summary:

  • EM encompasses a range of conditions from mild oral lesions to severe, life-threatening mucocutaneous reactions (SJS/TEN).
  • Herpes simplex virus is a common trigger for EM Minor, while systemic drugs are the primary cause of SJS/TEN.
  • Diagnosis is often made by excluding other conditions, and treatment varies from antivirals for EM Minor to immunosuppressants for SJS and supportive care for TEN.

Impact:

  • Clarifies the complex classification and varying etiologies within the Erythema Multiforme spectrum.
  • Emphasizes the importance of differential diagnosis in managing EM and its severe forms.
  • Provides a concise overview of current treatment modalities tailored to specific EM presentations, guiding clinical management.