[Childhood postinfectious erythema multiforme].

Area of Science:

• Pediatric Dermatology
• Infectious Diseases
• Immunology

Background:

• Postinfectious erythema multiforme (EM) is an uncommon but impactful childhood skin disease.
• EM lesions are characterized by a target appearance with central bullous formations.
• Mucosal involvement, particularly in infants, can lead to significant complications.

Purpose of the Study:

• To review the clinical presentation, diagnosis, and management of erythema multiforme in children.
• To highlight key infectious triggers and differential diagnoses in pediatric EM.
• To emphasize the importance of monitoring for mucosal involvement and potential sequelae.

Main Methods:

• Clinical diagnosis based on characteristic target lesions.
• Identification of common infectious etiologies, including Mycoplasma pneumoniae and Herpes simplex virus.
• Consideration of differential diagnoses such as Kawasaki disease and toxic epidermal necrolysis.
• Review of postvaccination erythema multiforme.

Main Results:

• Diagnosis is primarily clinical, often confused with urticaria multiforme.
• Mycoplasma pneumoniae and Herpes simplex are major infectious triggers.
• Atypical and recurrent forms of EM present with severe inflammation and exclusive mucosal involvement.
• Postvaccination EM has been reported with various pediatric vaccines.

Conclusions:

• Erythema multiforme in children usually has a good prognosis but requires careful observation for mucosal complications.
• Symptomatic treatment is the mainstay, with etiology-specific management when indicated.
• Distinguishing EM from other conditions with similar presentations is critical for appropriate care.