I had my follow up today and found out what exactly is in my jaw. It's called Schwannoma, which is a benign tumor. My surgeon was very pleased with this because he won't need to take out much of my jaw bone, which means I won't need any reconstructive surgery on my jaw. I have my surgery scheduled for August 22.
Also, apparently it's rare for this particular tumor to be found in the jaw, so the pathologist wants to take pictures of the surgery and use my x-rays to publish this finding, which is pretty cool.