Most surgeries that require mastectomy are for malignant tumors of the breast, and how long you live after surgery depends on the stage of the breast cancer.
Early stage breast cancer is one of the better prognoses of all tumors. The good prognosis includes better treatment and longer survival time after treatment, as well as improved quality of life, and some patients can be completely cured. Early stage breast cancer usually refers to stage I breast cancer. Early stage breast cancer has no obvious symptoms and is not widely metastatic or invasive, so the survival rate is high after resection.
Survival time after late resection is a matter of idiosyncratic factors, with most people reaching the end of the line in 3 or 5 years and a small percentage, like miracles, living. As for how long you can live with advanced breast cancer, it depends on the person, the disease, and the outcome of treatment. For example, in case of bone metastasis, after chemotherapy or sulfate treatment, the bone metastasis can disappear and reach clinical cure; in case of liver metastasis, through chemotherapy, interventional therapy and endocrine therapy, the lesion can shrink or disappear and reach clinical cure; in case of brain metastasis, the survival time of patients is usually within one year. The patients with advanced malignant tumors should adjust their good attitude and actively accept the treatment not only to prolong their lives but also to live a better quality of life.