BIRADS 3 means there is a finding with some features that are concerning, but there is a less than 2% chance it is malignant. Since breast cancer typically grows slowly, the radiologist will want to do studies over time to see if the finding changes. Follow up studies typically are done 6 months, 1 year, sometimes at 18 months and again 2 years after the original finding. If there are no changes in the finding, women are usually put back into the routine screening schedule. Note that at the 1 and 2 year marks, both breasts are imaged to be sure the unaffected breast is screened annually.