and that you kept at it until you got some answers!
Keeping your docs straight can be a challenge once you pass the dozen mark..I know from experience and can sympathize.
That biopsy will keep you on tinterhooks until the results are in, but then, be prepared for every single doc visit w/a notepad and pen as options will be put to you and it's gonna be up to you to learn about them and decide which ones are best for YOU. Be sure to ask, no seriously request a copy of the results and use the 'web' to learn as much as possible about the situation. I speak as a cancer survivor myself [w/an autoimmune neuropathy] and I've rarely had a doc get sticky about copies.
Hopefully, the biopsy will not be cancerous and more simply [HAH?] autoimmune of a different nature.
In the meantime, don't worry about the possibles yet. There are too many variations. Save the energy for the likely/definites and then research away!
Hang in there! - j