I am wondering where you have gotten the idea that excisional bx might cause a recurrence? As far as I know, and the medical literature shows, this has never been proven to be a fact but rather a myth. Also, there was some thought years ago that FNA MIGHT cause cancer cells to spread, but that was disproven by several research studies.
In most cases, the biopsy itself is not the definitive treatment, it is only used for diagnosis. Once the diagnosis is determined, then further treatment is decided upon - be it more surgery, radiation, chemo, or a combination.
This site from the Mayo clinic has an interesting section on "debunking cancer myths" with this being one of them.
http://www.mayoclinic.com/health/cancer/HO00033 Your drs should be able to help you make the right decision - you are being seen at a comprehensive cancer center, which is what any of us would recommend.