Metastatic breast cancer involves cases where the cancer has spread from the breasts to other organs in the human body, thereby resulting in malignancy. According to World Health organization (WHO) in 2012, around 521,000 people died due to breast cancer and this number is expected to increase in the near future. Like other metastatic cancers, surgical removal of metastatic breast cancer is deemed ineffective and often results in increased chance of death (nearly 80% - 90% of the diagnosed population). Prognosis is generally based on the stage of breast cancer in the patient; this staging is done by the usual TNM staging method, wherein T stands for tumor, N stands for node swelling, followed by M i.e. the metastatic stage of the cancer. These symptoms are used in the classification of metastatic breast cancer into 4 stages, stages 1- 3 involves gradual spread of carcinoma from various regions of the breast but doesn't involve metastasis; stage 4 shows a full blown metastasis which shows involvement of lymph nodes near or distant from the breasts and spread to other organs including bones, lung and the brain. Bone cancer is the most commonly reported (around 70% of cases) form of cancer originating from metastasis of breast cancer. Recurrence of cancer in stage 3 and stage 4 patients show lesser chance of successful prognosis. Systemic chemotherapy drugs (along with anti estrogen compounds, dpending upon the oncologists' inference) are usually prescribed to target cancer cells.