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Annular Lesion

Aka: Annular Lesion, Annular Ring

I. Definition: Ring-shaped lesion

  1. Circular or oval Macule or patch
  2. Erythematous outer border
  3. Central clearing

II. Causes

  1. Tinea Corporis or Ringworm (most common adult cause)
  2. Pityriasis Rosea
  3. Granuloma Annulare
  4. Sarcoidosis
  5. Leprosy (Hansen's Disease)
  6. Urticaria
  7. Subacute Cutaneous Lupus Erythematosus
    1. Lesion seen in Systemic Lupus Erythematosus
  8. Erythema Annulare Centrifugum
  9. Erythema Chronicum Migrans (Lyme Disease)
  10. Erythema Multiforme
  11. Psoriasis
  12. Nummular Eczema
  13. Annular Lichen Planus

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