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Betel quid-induced oral lichen planus: a case report.

The social use of betel nut is relatively common in certain geographic areas, especially India and Southeast Asia. The term betel nut does not truly describe the product that is chewed; rather, the term quid is more accurate because it refers to a substance or mixture of substances, including the areca nut, that are chewed and remain in contact with the mucosa. Betel quid is a type of quid that contains betel leaf. Chewer's mucosa and oral submucous fibrosis are clinical entities that have been associated with betel quid use. We report a case of oral lichen planus induced by betel quid use in a 79-year-old Cambodian woman.