Why can’t they do a core biopsy with a local with an ultra sound. That is a piece of cake to have. I would not let a surgeon do an excisional biopsy on me without a core being done first. Get a second opinion. I am so sorry you are going through this. I know how scary it is. But you have time to make a good decision. To get a second opinion they send your records to the place of your choice. It does not take a lot on your part. Do it before you let them do surgery. Not all radiologist are greated equal. Excisional biopsy is too invasive. I have had both.