Short Brown Parallel Lines on the Proximal Nail Fold. Clinical-Dermoscopic-Histologic Correlation of a Melanocytic Nevus of the Eponychium.

Introduction: Although Hutchinson's sign can appear associated with benign conditions, dermoscopic findings of non-melanoma eponychium pigmentation have not yet been described in the literature. We report for the first time to our knowledge the dermoscopic findings of an acral nevus located in the proximal nail fold as well as its clinical-dermoscopic-histologic correlation. Case Report: A twenty-year-old patient presented with a homogeneous longitudinal melanonychia on the left-hand thumb, with benign dermoscopic pattern, and an irregular, 6-mm, dark-brown hyperpigmented macule on the adjacent eponychium (Hutchinson's sign). The eponychium lesion showed on dermoscopy two irregular brown-black pigmented blotches, with superimposed parallel brown lines on a brushy distribution, with a thicker terminal end. The histopathologic examination of the proximal nail fold was performed, revealing scattered nevus cells in the epidermal basal layer and dermal-epidermal junction thecae, without any atypia or mitosis. These features were consistent with nevus of the proximal nail fold. Discussion: Previous descriptions of benign hyponychium's pigmentations, despite the malignant appearance of the overlying melanonychia, were reported to have a similar dermoscopic pattern, known as longitudinal brushy pigmentation. This newly described dermoscopic sign on the eponychium may help distinguish Hutchinson's sign related to subungual melanoma to non-melanoma Hutchinson's sign.

A rapidly growing eccrine poroma in a pregnant woman.

A variety of tumors develop or exacerbate during pregnancy and it is well known that a noticeable increase of eccrine activity occurs in this period. Eccrine poroma is a benign neoplasm that originates from the eccrine sweat gland. The development of this tumor during pregnancy is extremely infrequent. We report a rare case of rapidly growing eccrine poroma in an unusual location (the nose) in a pregnant woman.

Cloruro de aluminio hexahidratado en el tratamiento de las pustulosis palmoplantares. Estudio preliminar / Aluminium chloride hexahydratate in the treatment of palmoplantar pustulosis. A preliminary study

La pustulosis palmoplantar (PPP) es una enfermedad cutánea crónica que se caracteriza por la presencia de pústulas estériles en palmas y plantas. Actualmente se desconocen las causas por la cuales esta afección se presenta exclusivamente en esta localización, donde existe una importante riqueza de glándulas sudoríparas ecrinas en relación a otras zonas de la piel. La PPP es a menudo refractaria a los tratamientos, incluyendo corticosteroides tópicos de alta potencia y sistémicos. Objetivo: evaluar la eficacia del cloruro de aluminio hexahidratado al 20 por ciento en solución acuosa en el tratamiento de la PPP. Material y métodos: estudio abierto realizado sobre 12 pacientes con PPP (seis tratados con cloruro de aluminio hexahidratado y seis tratados con placebo) durante 5 meses. Resultados: se observó una buena respuesta en el 100 por ciento de los casos tratados con el cloruro de aluminio a los 5 meses (16% de eficacia en el grupo tratado con placebo). No se apreciaron efectos secundarios. Conclusiones: el tratamiento con cloruro de aluminio hexahidratado al 20% en solución acuosa es una terapia efectiva en pacientes con PPP (AU)