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Annular LesionAka: Annular Ring

Definition: Ring-shaped lesion
1. Circular or oval Macule or patch
2. Erythematous outer border
3. Central clearing
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
References
1. Hsu (2001) Am Fam Physician 64(2):289
2. Nopper (1998) Pediatr Ann 27:136

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This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 5/10/2008. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.

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Annular LesionAka: Annular Ring

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