You'll note that those are all questions that a doctor should be able to answer before a biopsy. Maybe you're more polite than me, but if a doctor told me that I or my child needed surgery under general anesthesia, I would insist on answers to those sorts of questions.We were told to wait for the biopsy.
And another very important one that I forgot to list above would be "What is the threshold of risk necessary for you to recommend this surgery?"