title: Oral Pathology Quiz #78. Case number 1. Benign hyperkeratosis.
mesh_terms: D003937:Diagnosis, Differential; D005882:Gingival Diseases / Q000473:pathology*; D006801:Humans; D007642:Keratosis / Q000209:etiology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D014030:Tobacco, Smokeless / Q000009:adverse effects