Dear Carol05: Without review of the mammogram, ultrasound and reports, we cannot comment on the comment about the "scar tissue" or what was meant by that. There are things that are found in the breast that are called "scar" but this are usually identified with biopsy, not imaging and they have nothing to do with scar tissue in the traditional sense.
The new mammogram shows a density and calcifications which means it needs further investigation. Spot compression and ultrasound will assist with this. Regardless of what the "scar" comment meant, it would be important to follow up on the recommendation for further evaluation. We cannot speculate on what this might be without further evaluation.