Below this post I have listed several cross-links to articles that address the difference between FISH (Fluorescence In Situ Hybridization)
and IHC (ImmunoHistoChemistry) testing. The FISH and IHC tests are used to determine HER-2 positive status. It should be noted that clinical trials utilizing herceptin generally require FISH testing to confirm HER-2 positive status even if an IHC test was already performed.
I hope this information is helpful.
Warmest regards
Paul C.
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