title: Malignant transformation in oral lichen planus.
abstract: A carcinoma arose in the buccal mucosa of a 71-year-old woman suffering from several systemic diseases, and on extensive medication. The buccal mucosa had been affected by oral lichen planus for more than 9 years. The possibility of malignant transformation of oral lichen planus is discussed.
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008010:Lichen Planus / Q000188:drug therapy / Q000473:pathology*; D009059:Mouth Diseases / Q000188:drug therapy / Q000473:pathology*; D009062:Mouth Neoplasms / Q000473:pathology*; D010212:Papilloma / Q000473:pathology