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以往总的流行病学调查报告表明口腔扁平苔藓(Orallichenplanus ,OLP)的患病率为 1 %到 2 %。其恶变率在 0 4和 5 6%之间 ,平均每年为 0 2 %。Krutchkoff等回顾了 1 950年至 1 976年间发表的文献 ,发现仅有少数的OLP恶变病例报告有充足的记录
Past general epidemiological surveys indicate that the prevalence of Orallichenplanus (OLP) is 1% to 2%. The malignant rate is between 0 4 and 56%, with an average of 0 2% per year. Krutchkoff et al. reviewed the literature published between 1950 and 1976 and found that only a few cases of OLP malignancy have reported adequate records.