A Japanese Case of Nonpustular Annular Psoriasis

019 pityriasis rosea, Sjogren’s syndrome, subacute cutaneous lupus erythematosus, tinea corporis, erythema gyratum repens (EGR) and erythema annulare centrifigum. These can be differentiated by laboratory investigation and histopathological analysis. Specifically recurrent circinate erythematous psoriasis (Bloch), though clinically similar, is characterized by the presence of histopathological Kogoj’s spongiform pustule formation. Clinical feature of EGR is characteristic and shows rapidly migrating erythema composed of concentric rings forming a wood-grain pattern. Furthermore, the patient had no evidence of internal malignancy. Thus we excluded the diagnosis of EGR. Erythema annulare centrifugum was excluded by histological findings showing no coat-sleeve-like mononuclear cell infiltration.