Hi,
Your mom’s tests report is really not concerning except for the “Pleomorphic calcifications” in her left breast. These types of calcifications are not cancer themselves, but can indicate problematic cells in the surrounding tissue. More often than not they turn out to be benign, however only a biopsy can truly determine if the cells are malignant or not. Since your mom’s mammograms and Ultrasound have shown no lumps or other suspicious abnormalities it’s a good sign. However if the cells are determined to be malignant it's undoubtedly extremely early (Stage 0), and thus completely curable. Some oncologists don't even consider stage 0 cancer, but rather a pre-cancerous condition.
Try not to worry too much since your Mom’s breast calcifications are still being evaluated and I hope that her upcoming biopsy will clarify things and results in benign findings.
All the best to you both..