Annular Erythema: New and Revisited Variants

Several skin diseases can present with annular lesions, including granuloma annulare, urticaria, tinea, erythema chronicum migrans, and lupus erythematosus. In addition, there are rare annular diseases whose nosographic identity is accepted including erythema annulare centrifugum (EAC) and erythema gyratum repens. In this chapter, rare variants of annular erythema whose nosographic positioning is still debated are discussed. They are annually recurring EAC, neutrophilic figurate erythema, palpable migratory arciform erythema, eosinophilic annular erythema, and annular lichenoid dermatitis of youth.