B-rad or Bi-RAD is the staging of mammograms. Your Bi-RAD-0 is a good sign meaning they did not find actual cancer, but there is an area they want to look at again, it wasn't clear enough. It was explained to me that after breast surgery or radiation, it is common to have "fat necrosis" where the fatty breast tissue is damaged, but it is not cancerous. I have had to have extra mammograms due to that. So please don't get too worried, but be vigilant. Sometimes the radiologist will follow up with an ultrasound. My radiologist took me aside to go explain all of this and helped me through it. And if you did not have that opportunity, please talk with your oncologist who an explain it better.