Psoriasis is associated with fissured tongue but not geographic tongue: a prospective, cross-sectional, case-control study.

Background And Objectives: It has been postulated that psoriasis is associated with tongue lesions and geographic tongue might be "oral psoriasis". However, reports are inconclusive, prevalence rates vary and data for Europe are sparse. In this prospective case-control study we investigated the point-prevalence of tongue conditions in an Austrian cohort.