Evidence for the association of Hashimoto's thyroiditis with psoriasis: a cross-sectional retrospective study.

Background: Current information indicates that psoriasis is a metabolic disorder with systemic manifestations. Reports have revealed an association between psoriasis and several chronic autoimmune disorders. For one of these disorders, Hashimoto's thyroiditis (HT), there are scarce, and relatively unconfirmed, reports of an association with psoriasis.