It bears watching and occasional biopsy. Keritosis is a normal reaction to things that have happened, and that some of that area tests as dysplasia, wouldn't be unusual. But there are low and high risk dysplasias, and not one size fits all. Of ALL dysplasias, only about 25% ever convert fully to malignancy according to Mark Lingen MD a very well respected oral pathologist, researcher and member of the OCF science board who I have lectured with a few times. So you can do a couple of things. Since it is likely superficial, it could be removed, perhaps with a laser. Or you could chose to watch it and have routine biopsy on a regular schedule done of it to see if it is ever going to progress to something more dangerous. If it begins to convert to something you would (because of your diligence in monitoring and routine biopsy) be catching it at the earliest possible moment when dealing with it would likely be minimal.