Abstract
Lupus erythematosus tumidus(LET), a subtype of cutaneous lupus erythematosus, is clinically characterized by purple patches and single or multiple exudative plaques with smooth surfaces and sharp boundaries which usually occur on sun-exposed areas, and marked photosensitivity without scar formation or epidermal changes such as erosion, atrophy, scaling and follicular plugging. Histopathologically, LET is characterized by lymphocytic infiltration around deep or superficial blood vessels and appendages as well as by mucin deposition in the reticular dermis without obvious epidermal involvement. Direct immunofluorescence(DIF)staining for immunoglobulins is negative. Chloroquine and hydroxychloroquine are effective for the treatment of LET. Key words: Lupus erythematosus tumidus; Photosensitivity; Direct immunofluorescence; Histopathology
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