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erythema annulare
Etiology:
1) generally idiopathic
2) drug hypersensitivity
3) sometimes associated with Tinea pedis
4) paraneoplastic syndrome (rare)
Clinical manifestations:
1) erythematous, flat or slightly raised lesion
2) trailing scale on inner aspect of expanding ring
3) generally occurs on buttocks & upper thigh
General
figurate dermatitis (rings, arcs)
References
Harrison's Principles of Internal Medicine, 13th ed.
Isselbacher et al (eds), McGraw-Hill Inc. NY, 1994, pg 293