Hello and welcome to the forum. We appreciate your question. You've likely had the follow up sonogram? Bi rad score of zero means abnormal but not suspicious. The scale is Bi rad 0 to 6. 6 is definite cancer. So, you truly originally got a result that indicates they just want to take a closer look. This is good medicine and they are being thorough. I know it is worrisome especially when one has anxiety. But most of the time, these re checks result in an all clear. Please know that many benign masses can be hypoechoic and even resemble cancer. But ARE benign. Please let us know how your follow up went.