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DDx

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  • Herpes simplex

  • Erythema multiforme

  • Drug reaction

  • Pemphigus

  • Bullous pemphigoid

  • SLE

  • Lichen planus

  • Coxsackievirus (herpangina, hand-foot-mouth disease)

  • Acute HIV infection

  • Parvovirus

  • Varicella zoster

  • Syphilis

  • Oral candidiasis

  • Behçet's syndrome

  • Reactive arthritis

  • Inflammatory bowel disease

  • Squamous cell carcinoma

  • Necrotizing ulcerative gingivostomatitis (Vincent's fusospirochetal disease)

See related DDx

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