Table 2.

Main characteristics of rare annular dermatoses

	Erythema annulare centrifugum	Annually recurring erythema annulare centrifugum	Palpable migratory arciform erythema	Neutrophilic figurate erythema	Eosinophilic annular erythema	Annular lichenoid dermatitis of youth	Annular erythema in Sjögren syndrome
Age Gender	V decade of life M:F=1:1	47 years M:F=1:2.4	49 years M:F=1.5:1	pediatric patients: 9 months-2 years M:F=1:4 adults: 41 years M:F=1:2.5	20-85 years M:F=1:1.14	11 years M:F=1.6:1	36 years M:F=1:5
Most common localizations	thighs, hips	extremities	upper trunk	trunk	trunk, extremities	flanks, groin	face, neck, upper extremities
Duration	days-months	days-weeks, recurring	days-weeks	weeks-months	relapsing-remitting	relapsing-remitting	relapsing-remitting
Inflammatory infiltrate	Occasional mild spongiosis (superficial type), perivascular histiocytes, lymphocytes and rare eosinophils superficial or deep		Deep dermal perivascular and periadnexal lymphocytes and histiocytes	Superficial and deep perivascular and interstitial infiltrate with numerous neutrophils and nuclear dust, rare eosinophils	Superficial and deep perivascular and interstitial lymphohistiocytic infiltrate with abundant eosinophils and few neutrophils	Lichenoid infiltrate at the tip of rete ridges. Lymphocytes, few histiocytes, scattered melanophages	Perivascular lymphocytes with nuclear debris. Lymphocytic hidradenitis