question about her2serum test

[Lauriesh]

I was wondering, after reading kim's thread about her her2serum test results, how many stage 4 women are now having this test.

I have been stage 4 for almost a year and have not had it yet.

I read some old threads from 2009, and saw back then that a lot of oncs weren't using it. Has it become more widely used in the last couple of years?


Also, I read some of the studies that talked about how a low her2serum result can predict longer survival (I hope that I read that correctly)
Do you think that having a low tumor marker result is predictive of prognosis/survival? My tumor marker (ca 27) ranged from 9 to 11 from when I was diagnosed stage 2 in 2005 until March, 2010. It was at 50 when I was diagnosed with liver mets in July, 2010. I am now NED, and my number is back at 9. I know that if it would start to rise, it is probably an indicator that I should have scans, but does a low number mean anything in terms of prognosis/survival?
Thanks,
Laurie