m not sure why this is labeled fat
necrosis, but a BIRADS 3 rating often results in a wait
and see, with possibly a 6 month follow-up, not necessarily a biopsy. I would definitely ask your doctor why she thinks it should be biopsied. Did your doctor mention fat necrosis? Fat necrosis is a benign condition, supposedly produced by trauma to the breast, considered somewhat rare (except in cosmetic surgery circles apparently). I don't believe it is as rare as indicated.