@callalloo just to clarify the term "biopsy." My HER2+ was from initial biopsy, when the doc takes a very small piece of a possible cancerous area and tests it. My HER2 equivocal/negative was from pathology lab testing after surgery. I just wanted to make sure that was clear since you used the term "post-surgery biopsy." I consider "biopsy" and "post-surgery" testing to be two different things but I can see how they might be used that way. Post surgery though the entire tumor has been taken and made into identifiable "blocks." In my case the blocks all had some different characteristics so in seeking more testing I had to become familiar with each and select the one I most wanted information on.