Moderately differentiated relates to aggressiveness - the closer the cancer looks to your normal cells the more aggressive it can be. Poorly differentiated = highly aggressive, moderately is exactly what it sounds like! and well differentiated is the least aggressive. Invasive means it is not superficial it has moved into the surrounding tissue and has depth. I would not let them remove your wisdom tooth. Firstly they would be messing with an area that may still have some microscopic cancer opening you up cutting that area is bloody and to me just gets it moving, secondly (I had radiation to my tongue and both sides of my neck and they did not remove any of my 3 impacted wisdom teeth) it has never bothered you, and thirdly the wait time is too long.

The potential problem with leaving it is if you do have problems later in life with your wisdom tooth, having it removed can be a major issue with your jaw. But that goes for all teeth not just wisdom teeth.

I'm sure someone else will be around to give you there opinion.

Hugs and good luck