Psoriasis on Lesions of Vitiligo: A Case Report.

Vitiligo and psoriasis are common T cell-mediated autoimmune skin diseases, and the association of the two disorders has been well known. In most cases, vitiligo precedes the onset of psoriasis. In this study, we reported a case of vitiligo who developed psoriasis following an upper respiratory tract infection with a uniform shape of psoriatic lesions at the phototherapy site of vitiligo. After 2 months of discontinuation of phototherapy and concurrent treatment with topical corticosteroid and calcipotriol, the psoriasis lesions were significantly improved.