Ring within a ring appearance: A confounding manifestation of erythema annulare centrifugum

Abstract

Erythema annulare centrifugum is one of the figurate erythemas which clinically presents by annular, polycylic, erythematous plaques which is characterized by scaling behind the progressing edge. It is considered to be a hypersensitivity reaction to an antigen. Various etiological factors like cutaneous or systemic infections, drugs, malignancy, pregnancy are considered. Hereby we report a case of erythema annulare centrifugum which was treated for long period of time considering to be a dermatophytosis. This report highlights the need to be vigilant for diagnosing this condition in patients presenting with erythematous annular plaques.