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Updated: Jun 6, 2025

Precision Implementation of Minimal Erythema Dose MED Testing to Assess Individual Variation in Human Inflammatory Response
Published on: October 3, 2019
Erythema multiforme
Elio Kechichian1, Nicolas Dupin2,3, David A Wetter4
1Department of Dermatology, University of Sherbrooke, Sherbrooke, Quebec, Canada.
Abstract:
Erythema multiforme is an inflammatory skin and mucosal disease mainly related to infectious agents such as Herpes simplex virus, Mycoplasma pneumoniae, though it can also be "idiopathic". The characteristic skin lesions are typical or atypical acral raised target lesions. The oral mucosa can be affected, alone or in combination with other mucosal/cutaneous sites, sometimes causing extreme pain, severely impacting food intake, and warranting hospitalization. A comprehensive understanding of erythema multiforme clinical characteristics, triggering agents, and differential diagnosis including Stevens-Johnson syndrome/Toxic Epidermal Necrolysis, is crucial to conduct proper workup and management. Mycoplasma pneumoniae infection should be immediately ruled out because of the need of antibiotics. The cornerstone of management is symptomatic treatment and will be detailed in this review as well as the etiologic treatment. Lastly, the management of persistent or recurrent erythema multiforme can be challenging, especially when antivirals fail to prevent a relapse, but breakthrough treatments have been reported successful in this difficult-to-treat subset of patients.
Funding:
The Funding was provided by the University of Sherbrooke Faculty of Medicine and Health Sciences.
Insights
Erythema multiforme is an inflammatory skin condition often triggered by infections. Prompt diagnosis and management, including ruling out Mycoplasma pneumoniae, are key for patient recovery and preventing complications.
Area of Science:
- Dermatology
- Infectious Diseases
- Immunology
Background:
- Erythema multiforme (EM) is an inflammatory skin and mucosal condition.
- It is primarily linked to infectious agents like Herpes simplex virus and Mycoplasma pneumoniae, but can be idiopathic.
- EM presents with characteristic target lesions on the skin and can affect oral mucosa, causing severe pain and impacting nutrition.
Purpose of the Study:
- To provide a comprehensive understanding of Erythema multiforme's clinical features, triggers, and differential diagnoses.
- To outline essential workup and management strategies for EM.
- To discuss the challenges and emerging treatments for persistent or recurrent EM.
Main Methods:
- Review of clinical characteristics of Erythema multiforme.
- Analysis of triggering agents, including infectious causes.
- Discussion of differential diagnosis, focusing on Stevens-Johnson syndrome/Toxic Epidermal Necrolysis.
- Evaluation of management strategies, encompassing symptomatic, etiologic, and advanced treatments for refractory cases.
Main Results:
- Erythema multiforme diagnosis requires understanding its varied clinical presentations and triggers.
- Mycoplasma pneumoniae infection necessitates immediate identification due to antibiotic treatment requirements.
- Symptomatic and etiologic treatments form the basis of EM management.
- Recurrent or persistent EM cases may require advanced therapeutic interventions when standard treatments fail.
Conclusions:
- Accurate diagnosis and prompt management of Erythema multiforme are crucial, especially ruling out Mycoplasma pneumoniae.
- Effective management involves symptomatic care, etiological treatment, and tailored approaches for persistent or recurrent cases.
- Understanding differential diagnoses like Stevens-Johnson syndrome is vital for appropriate patient care.
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