title: Oral Pathology Quiz #90. Case Number 1. Frictional keratosis.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D019871:Dyskeratosis Congenita / Q000175:diagnosis; D017276:Friction; D006801:Humans; D007967:Leukoedema, Oral / Q000175:diagnosis; D007972:Leukoplakia, Oral / Q000175:diagnosis*; D008297:Male; D014060:Tongue Diseases / Q000175:diagnosis; D014062:Tongue Neoplasms / Q000175:diagnosis*