Hello, You can get your mother treated at any of the above given hospitals. All of them treat Metastatic Breast Cancer. All the Hospitals would give you best quality treatment. You can go to Government/ Charitable Hospitals if you want treatment that would be cost - effective but with the possibility of a long waiting period. 

Some of the leading Charitable/Government Cancer Hospitals in India, who are also affordable: 

• Tata Memorial Hospital, Mumbai (Government Hospital)
• Kidwai Memorial Institute of Oncology, Bangalore (Government Hospital)
• All India Institute of Medical Sciences, Delhi (Government Hospital )
• Rajiv Gandhi Cancer Institute and Research Centre, Delhi (Charitable Hospital)
• Adyar Cancer Institute, Chennai (Charitable Hospital)
• Shri Shankara Cancer Hospital and Research Centre, Bangalore (Charitable Hospital)

You can find more hospitals on this page - Breast Cancer Treatment Hospitals in India.