Özet:

The World Health Organization (WHO) has accepted the classification of precancers into precancerous (premalign) lesions and precancerous (premalign) conditions. There is a general agreement that a premalign lesion is defined as "a morphologically altered tissue in which cancer is more likely to occur than its apparently normal counterpart. Examples for premalign lesions are leukoplakia, erythroplakia, palatal lesions associated with reverse smoking and actinic cheiloses. Examples for premalign conditions include oral submucous fibrosis, lichen planus, discoid lupus erythematosus, sideropenic dysphagia, epidermolysis bullosa and xeroderma pigmentosa. In this rewiev, we aimed to give information about leukoplakia and erythroplakia which are the most common pre-malign lesions and lichen planus that is one of the pre-malign conditions.

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