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Image Number 902 (Erythema multiforme)

 
Morphology:
Red,nonscaly

Diagnosis: Erythema multiforme

Site: Hand,palm

Sex: M

Age: 67

Type: Clinical

Description: Target lesions

Submitted by: Ian McColl

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Differential Diagnosis

History: Sudden onset of this rash after a preceding herpes simplex infection 10 days before. Erythema multiforme is a reaction pattern in the skin due to many causes including infections such as herpes simplex, drug reactions particularly to antibiotics and sometimes mycoplasmal chest infections.It is thought to be a Type 2 cytotoxic reaction to keratinocytes expressing a viral, bacterial or drug antigen.

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