I've had several of these over the years (it is a pretty rare cancer), and so much depends on how localized the tumor is. If there is spread, the aim is to give as much quality time as possible.
I've had a couple that have been isolated to the gland and surgical removal was curative with no chemo after.
Discuss all this with the oncologist, but don't give up hope.
Doug, DVM
Doug & Sandy
Kaylee
Winnie 6 1/2 year old golden
2008 Southwind 2009 Honda CRV