Mike
The doctor who diagnosed your leukoplakia advised either 'watching' the site, or a biopsy, right? Many times white patches will go away if the patient will stop the habit that caused it, but I am more inclined to refer for a biopsy just to be sure. Look for an oral and maxillofacial surgeon to evaluate this futher and/or to do this procedure. Sooner is better.. Good luck to you.