Lind P O, Strømme Koppang H, Aas E
Int J Oral Surg. 1985 Dec;14(6):509-16. doi: 10.1016/s0300-9785(85)80057-0.
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.