乳腺癌report, 请各位专家和前辈提建议

Biopsy Report: right breast

ER + (strong)
PR + （weak）
Her2 -

right breast: the mass is irregular margins and strongly enhances kinetics.

size: 2.0 x 1.5 x 1.5. No associated chest wall invasion.

left breast: there are patchy areas of progressive enhancement.geographic and non-masslike. microcalcification.

Biopsy Report: left breast (2nd biopsy)

Atypical ductal hyperplasia and Fibroadenomatous changes.

the focal area showing a solid and cribriform pattern . 1.6mm

Doctor's suggestion: mastectomy and sentinel lymph node biopsy for right breast and armpit, and during the surgery, take out more tissue at the suspicious areas of the left breast and do biopsy again.

Question:

proliferation rate 90% (high)MRI Report: for both breasts

从这些结果看，情况很严重吗？是常见的cancer type吗?

就目前的情况下，这个医生的建议是最好的选择吗？

感谢大家提建议。