What are the treatment options for a patient diagnosed with breast cancer?

 Mrs. Williams is a 27-year-old female diagnosed with breast cancer. She is currently in pharmacy school. She does not have children, but hopes to have them someday. She has been tested and has a genetic predisposition for this disease.

What are the treatment options for a patient diagnosed with breast cancer?
What are the advantages and disadvantages of those treatment options?
What would you tell Mrs. Williams if she decided to refuse treatment?
Mrs. Williams really wants to have children before she starts treatment. What would you educate her about? Why?