Humans 9 human 9 malignant transformation Article 8 adult 6 leukoplakia 6 aged 5 female 5 male 5 Cell Transformation, Neoplastic 4 Female 4 Middle Aged 4 Mouth Neoplasms 4 Precancerous Conditions 4 dysplasia 4 histopathology 4 lichen planus 4 major clinical study 4 mouth tumor 4 pathology 4 priority journal 4 Aged 3 Male 3 Retrospective Studies 3 cell transformation 3 clinical outcome 3 controlled study 3 follow up 3 hyperplasia 3 middle aged 3