title: Oral pathology quiz #82. Case number 2. Frictional hyperkeratosis.
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D017276:Friction; D006801:Humans; D007972:Leukoplakia, Oral / Q000175:diagnosis*; D008297:Male; D014072:Tooth Abrasion / Q000175:diagnosis