Mastectomy is a surgical procedure in which the surgeon removes all or part of the breast tissue.
The plastic surgeon is the doctor who specializes in cosmetic and reconstructive surgery.
The oncologist at a doctor specialized in diagnosing and treating cancer.
The mastologist is a doctor who prevents, diagnoses and treats breast disease.
A surgeon is a doctor who can prevent and diagnose a disease through surgery.
Remember that for the proper selection of health professional that treats mastectomy you must consider the nature, severity and symptoms you are presenting.