Malignant potential of the reticular form of oral lichen planus over a 25-year observation period in 55 patients from Slovenia.

A retrospective evaluation of the reticular form of oral lichen planus was made on the basis of clinical and histopathological observations in 55 patients. Patients were re-examined once every six months over a 25-year period. Biopsies were taken from all lesions. No cases of complete remission and no cases of malignant transformation were recorded. Our findings suggest that the reticular form of oral lichen planus is not a precancerous lesion.