Benign migratory glossitis or geographic tongue: an enigmatic oral lesion.

Benign migratory glossitis, or geographic tongue, is usually an asymptomatic inflammatory disorder of unknown etiology that affects the epithelium of the tongue. Local loss of filiform papillae leads to ulcer-like lesions that rapidly change the color and size. Histopathologic findings parallel the clinical appearance, and may have a psoriasiform pattern. The disorder is characterized by exacerbations and remissions. In most cases, patients do not require treatment other than reassurance about the benign nature of the disorder.