Hi there M0 means metastacies - moved out of the tumor, and nodes and somewhere else, lungs, etc.
Hmmm... Maybe it moved up from the tongue base. I had 1/3 of my tongue removed and replaced, dr. Rebuilt it with the skin from my inner wrist it's the thinnest skin in the body - and adapts well as a new tongue. I have a lisp because the my old tongue has to work double time to move the other half, and I do put it through its paces.

I only lisp when I'm tired or it's swollen which happens sometimes. (I have no lymph nodes on my left hand side) I don't swell all the time but every once in a while something will set it off.
The woman isn't on this site, she's actually on a Facebook group. If you friend me on Facebook I can add you to the group. She's at md Anderson.
What they described to you interns of surgery sounds okay. They may not be taking a lot... Also sme drs are now retaking the skin under the chin (if you have any hanging there) however if you have Avila hair there I would suggest the wrist.

take care.