Erythema multiforme

Characteristic features:

• vesicles and bullae formation

• common in infants till young adults

• features in three types: major (mucocutaneous ocular), minor (mucocutaneous) and chronic

• desquamative gingivitis

• bloody crusted lips

• iris/target lesion, dull red maculopapular lesion on extremities and neck

• large, deep, irregular, hemorrhagic ulcers

• immunologically-mediated

erythema multiforme

Differential diagnosis:

• pemphigus vulgaris

pemphigus vulgaris

• benign mucous membrane pemphigoid

benign mucous membrane pemphigoid

benign mucous membrane pemphigoid

• Acute herpetic gingivostomatitis

Acute herpetic gingivostomatitis