part_of part of part of has_disease_location epithelial cell mouth dysplastic nevus dysplastic oral keratinocyte oral cavity dysplasia Premalignant or precancerous (also referred to as “potentially malignant”) oral lesions involve the skin lining of the mouth (known as the epithelium) and may be at risk for becoming (transforming into) an oral cancer, although it is difficult to predict which lesions will transform and how long it will take. oral epithelial dysplasia Sirarat Sarntivijai http://www.aaom.com/index.php?option=com_content&view=article&id=138:premalignant-oral-lesions&catid=22:patient-condition-information&Itemid=120 premalignant oral lesion premalignant oral lesions