Abstract Neutrophilic dermatoses encompass a wide spectrum of diseases characterized by a dense infiltration mainly composed of neutrophils. Neutrophilic dermatosis of the dorsal hands is currently considered a localized variant of Sweet syndrome. Cocaine abuse has been related to a wide range of mucocutaneous manifestations, including neutrophilic dermatoses such as pyoderma gangrenosum. The authors of this study present a patient with neutrophilic dermatosis of the dorsal hands, in which cocaine abuse was identified as a probable trigger.

Abstract Granuloma annulare may be caused by multiple triggers. Among these are vaccinations, which have been described as an infrequent cause of granuloma annulare. The authors report the first case of generalized granuloma annulare associated with pneumococcal vaccination in a 57-year-old woman, who presented cutaneous lesions 12 days after vaccination.

ABSTRACT Lichen aureus is a rare pigmented purpuric dermatosis. We present anunusual case because of the pediatric age and the great number of lesions with zosteriform distribution. He is a 10-year-old boy, with a brownish, smaller than 1 cm, sharp edges, lichenified surface, asymptomatic macule, over the inner aspect of the left leg with a zosteriform distribution. The histology showed a band-like inflammatory infiltrate in the superficial dermis, composed of lymphocytes, histiocytes, erythrocytes and haemosiderin. He was diagnosed with zosteriform lichen aureus and was treated with topical mometasone furoate during 3 weeks resulting in partial lightening of the macules. Lesions have remained 2 years later, and new ones have appeared in the ipsilateral ankle. We must consider differential diagnosis with other pigmented purpuric dermatitis and pigmented purpuric mycosis fungoides. There are many therapeutic options and it tends to disappear spontaneously, so new studies are necessary

El liquen aureus es una dermatosis purpúrica pigmentaria infrecuente. Presentamos un caso inusual por su edad pediátrica y por la presencia de lesiones múltiples con patrón zosteriforme. Se trata de un niño de 10 años con máculas parduzcas, menores de 1 cm, con bordes definidos y superficie liquenificada, en la cara interna de la pierna izquierda con distribución zosteriforme, asintomáticas, de tres meses de evolución. La biopsia mostró infiltrado en banda en la dermis superior con linfocitos, histiocitos, hematíes y hemosiderina. Se diagnosticó liquen aureus zosteriforme y se trató con furoato de mometasona tópico durante 3 semanas con aclaramiento parcial. Las lesiones permanecen 2 años después y han aparecido nuevas en el tobillo ipsilateral. Debemos plantearnos el diagnóstico diferencial con otras dermatosis purpúricas pigmentarias crónicas y la variante purpúrica pigmentaria de la micosis fungoide. Existen muchas opciones terapéuticas e, incluso sin tratamiento, suelen desaparecer, por lo que son necesarios estudios que recopilen más evidencias.