Herceptin b/f Grade 3/comedo Mx?

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I have DCIS Grade 3 with comedonecrosis. There were 6 calcifications biopsied. The myoepithelial layer was present in the specimens. The anticipated size is 5 cm.

 I believe in chemotherapy or drug therapy before surgery. When surgery is performed, the blood supply to the tumor is disrupted, preventing the drugs from being as effective.

I have not been to a surgeon or an oncologist yet. I would like to know if anyone has heard of having Herceptin before mastectomy for DCIS? My biopsy also reported ER and PR positive. Has anyone heard of taking Tamoxifen before surgery? I am 54 but not post-menopausal. 

Thank you.