Psoriasis: current advances in etiology and treatment.

Psoriasis is a disease of major importance, the cause of which is unknown and treatment often difficult. However, research worldwide has intensified, and we now have an increased understanding of the events that lead to the production of a psoriatic lesion. Newer treatments and the revival of old therapies have increased the success rate in the management of this difficult disease but have also opened up new concerns regarding the safety of these modalities. This is a review of the current research on the etiology and treatment of psoriasis.