Recent sceening mammogram stated a nodular density is identified posteriorly in left breast. Went back for spot compression of left breast and received the following report from the radiologist: Upon spot compression, the area in question becomes less defined. Since it was only seen on one view, this was probably a benign entity, most compatible with superimposed glandular tissie. However, since it did appear to be new as compared to the last sceening mamogram, a six month follow up left mammogram would not be unreasonal. Birad 3. I am 45 with no family history. What exactly does this mean? The word "probably" makes me nervous. If it is not something to worry about, why do I need to go back in 6 mos?