Guías para el diagnóstico y manejo de la psoriasis
Resumen
La psoriasis es un desorden crónico inflamatorio de la piel, que afecta a un 2.6% de la población mundial. La susceptibilidad para desarrollar la psoriasis se encuentra en la región HLA del cromosoma 6, o cerca de ella. Las citoquinas involucradas incluyen interleuquinas 1-2-4-5-7-10, FNTa, IFNy, hemopoyetinas, factor estimulante de colonias granulocito-macrófago, quimioquinas, factores de crecimiento, endotelina 1. Entre los factores precipitantes se encuentran drogas, infección, alcohol y tabaquismo.
Clínicamente se caracteriza por lesiones con bordes delimitados, superficie compuesta por escamas plateadas, debajo de las cuales la piel muestra un eritema brillante y homogéneo; signo de Auspitz y fenómeno de Koebner.
A la histopatología se puede apreciar un espesor epidérmico 3-5 veces mayor, ausencia de las papilas dérmicas, paraqueratosis, aumento en el número de mitosis, y en la dermis se observan papilas finas, alongadas y prominentes, capitales tortuosos dilatados, estroma papilar edematoso,
infiltrado inflamatorio compuesto por linfocitos, macrófagos, neutrófilos y mastocitos en la dermis papilar, y microabscesos de Munro.
El diagnóstico se hace por los hallazgos clínicos e histopatológicos. Los objetivos generales del tratamiento son lograr remisiones largas y el antenimiento del paciente con pocos efectos secundarios; para ello existen diferentes estrategias terapéuticas como monoterapia, terapia combinada, terapia rotacional, terapia secuencial y terapia continua.
Biografía del autor/a
Carolina Alejandra Palacio Valencia, Universidad Militar Nueva Granada
RII Dermatología Universidad Nueva Granada, Hospital Militar Central, Bogotá, Colombia.
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