Mammogram results show focal densities in medial aspect of the anterior 3rd of the left breast?

Focal densities: A "density" is a very generic term. There are normal and abnormal densities in the breast. Was this reported on a screening mammo, and were additional views recommended? If so, it is likely that they are potential abnormalities that need additional views for clarification . The majority of these turn out to be nothing, but you need to have the extra views to be sure.