Thyroid abnormality in patients with psoriasis: prevalence and association with severity.

Background: Psoriasis is associated with several comorbidities and its association with thyroid abnormality has been hypothesized.

Objective: To assess the prevalence of thyroid abnormality in Brazilian patients with psoriasis and to analyze its association with severity, presence of psoriatic arthritis and immunobiological treatment. Additionally, to compare results with literature as a control.