A 36-year-old woman developed progressive dyskeratotic leukoplakia of the palate, lips, attached gingiva, and labial surfaces of the genitalia. On microscopic examination, clusters of dyskeratotic cells were found throughout the epithelium, except in the basal cell layer. The clinical and histologic differential diagnosis included candidiasis, oral hairy leukoplakia, lichen planus, condyloma acuminatum, Darier's disease, hereditary benign intraepithelial dyskeratosis, and white sponge nevus. Her clinical and histologic findings do not permit classification into any of these well-recognized entities.