agree with the above reply; breast cancer patients are usually managed with a team:
the one person patients never see is the most important: the pathologist; treatments are based on accurate pathology reports.; then surgeons, medical oncologists and radiation oncologists...
nurses and, depending on the treatment center, perhaps a social worker or some sort of support person.

Be sure to ask questions, understand options, etc and, if you aren'tcomfortable seek a second opinion.

Best of luck and I hope you meet with a supportive team.