Mastectomy. pathology report still says cancer. what now?

Staging: Various procedures will be done to determine how far the cancers has gotten, and the pathologist's determination of the type of cancer (there are maybe 100 for breast alone) will guide the decision whether or not to give adjuvant chemotherapy or some other intervention. Glad you're taking a proactive stance; good luck.

Need more details: It is not unusual to still have breast cancer in the mastectomy after receiving chemotherapy. Most women do well although the doctor will probably offer you some more treatments after you have recovered from mastectomy.

???: Not sure what you mean. Did you have chemo before the mastectomy? Or was it after a biopsy? You need to see an oncologist (if you have not already done so) who will go over your odds and what else to do. Chemo, hormones, or radiation may be options depending on your cancer characteristics. Best to you. Fight well and be strong.

Depends : If you did not have chemotherapy prior to the mastectomy, any further treatment will depend on grade, hormone and her 2 status and whether the cancer was completely removed. This means whether or not you have positive lymph nodes or evidence of distant metastasis. Prevention of local recurrence on the chest wall depends on whether the margins of the mastectomy specimen were clear (not involved).