Just some words on necrosis.
Some people can be a little disheartened when they see their 6 month or 12 month MRI and the tumour has grown and there are no changes to the enhancement.
Thoughts of OMG its bigger and it doesn't look like its dying, will I be one of the radiation failures?
The most important MRI's are the 2 year and 3 year. If the tumour is shrinking or stable between these two MRI's its good.
While necrosis is encouraging for us to see, it actually has no bearing whatsoever on the long term success of the treatment
Tumours that show early necrosis are just as likely to regrow as ones that show no necrosis whatsoever
So if you are one of the many that sees a bigger tumour with no necrosis at 12m or even 24 months DONT PANIC.
Its very common and pretty normal, breath be calm and wait for the 36 month scan, before jumping to any conclusions.
For those second guessing their treatment decision, I found this recent paper on regrowth after microsurgery
http://www.ncbi.nlm.nih.gov/pubmed/23370559.
The practice of keeping a small fragment to preserve the facial nerve is now very common.