http://www.labcorp.com/clinicaltrials/what/HER2.pdf
Hi Linda--
I'm glad to hear that you're getting your IHC confirmed. It is possible to be IHC positive, and FSH negative and still benefit from Herceptin... as long as you're strongly positive on the IHC. The link I've included from this site provides more detail re: the different test results and response rates to Herceptin. I've questioned my Onc about this issue as well, and feel comfortable that Herceptin will be a benefit to me (IHC 3+ and FSH -).
The one thing that seems to be clear is that having these tests done by a large testing center is key-- the more a lab does of these tests, the less likely they are to make a mistake.
Good luck!
Jen