I think of all the biopsys its 20% chance of having it, so thats 80% against....maybe more, especially if Birads is under4
There are percentages representing how many of each BIRADS rated films resulting in biopsy is found to be malignant but as far as Microcalcifications, I'm not sure. Microcalcifications do occur normally in breast tissue but when they are grouped or observed in clusters they do cause concern. They only indicate the reaction of breast tissue to an abnormal condition within the breast but not always cancer.