Fenretinide Mucoadhesive Patch: Evaluation of Oral Cancer Prevention Efficacy in Adults With Premalignant Oral Lesions.

All persons with premalignant oral epithelial lesions will receive active intervention. The intervention consists of b.i.d. application of the FMS to the premalignant lesion for a total of six weeks. Please note that the intervention title Drug and intervention titled Other are the same entity.