title: Severe leukoplakia of the oral cavity induced by habitual use of betel nut quid.
mesh_terms: D001114:Areca; D005260:Female; D006801:Humans; D007972:Leukoplakia, Oral / Q000209:etiology* / Q000473:pathology; D008875:Middle Aged; D010510:Periodontal Diseases / Q000209:etiology; D010946:Plants, Medicinal