Welcome Jesse
I read your intro post as well - so got a bit of the background. I too am a 38 year old (but only 1 month into it - with four little ones 7, 5, 3 and 2, but all closer to their next age!). I am also Canadian which makes fo,r I think, a pretty different treatment path (very conservative watch & wait).
1) I have been in watch & wait for 1 year - I too was diagnosed just before xmas last year. The tumor is purely intracanicular - only symptoms are minor hearing loss (pure tone average of about 30db now across the 500khz, 1000khz and 2000khz) and tinnitus. Doesn't bother me at all ... I actually sleep better because I sleep on the 'good' ear. High frequency is the issue. My word recognition remains very good at 60db (96%) but only 76% at 50db due to the high frequency loss.
2) size at diagnosis was 6mm x 8mm (or whatever my footnote suggest - to be honest, I have forgotten). I have had one subsequent MRI at 6 months (last May) - unchanged. My next MRI is January 29 - so very soon.
3) purely intracanicular. According to my ENT (practice at the large research centres in Toronto), I am not even to the starting line for measurement. According to these doctors (again probably very different compared to many of their US peers), the tumor measurements usually only start once you get to extracanicular. I think I am on the cusp though. If it grows, I will get to extracanicular.
4 and 5) Bit of a repeat - two scans - original diagnosis and one at 6 months. My next scan is January 29th - 8 month interval. The ENT would have gone for 12 months, I wanted the life line for comfort.
6) No growth
If you are a research reading type and have a curiousity about the conservative mgmt research done by the doctor I think I now have (whole other post ... lost my really nice ENT back to Ireland - got his senior researching boss) - send me a PM, and I will forward on. The premise of the two pieces of research is small AN population (not necessarily intracanicular - 170 patients, again if I remember correctly) over a 10 year period, only 30% grew. (none of the radiation type projected crap, population was tracked for 10 years) The other tumors were stable and required no treatment. For the 30% (round terms) who did require treatement (surgery or radiation), the hearing loss (SSD) and/or facial outcome were no different compared to the population who treated immediately. Obviously, always a personal decision. Outside of growth or persistent dizzy spells (intermittent at this point), I plan to do nothing other than follow-up MRIs. I am hoping for 10+ years and maybe never before I need any treatement. We shall see if the odds playout for me.
Good luck and sorry to have to welcome you.
Ann