Congenital linear psoriasis: case report and differences with ILVEN

Abstract

We report the case of a 5-year-old child who from birth had five erythemato-desquamative papulous lesions with a verrucose surface and linear distribution in the proximal region of the lower left leg not following the lines of Blashko. The morphological aspect and the evolution of the lesions, data from physical exploration of the skin and adnexa, the characteristics of the histopathology and its association with HLA Cw6 led us to diagnose congenital linear psoriasis. Differential diagnosis was established basically with ILVEN since distinction between the two entities is now traditional. We took into consideration the fact that linear psoriasis is a particular entity and can occur eongenitaliy, as in the case reported; although this is an exceptional occurrence.