Hi Alina, just adding a bit to what Sana already shared since I think it covers the main points well.
One thing worth keeping in mind is that "success" can mean different things depending on who you ask. For some it means the tumor was fully removed with clear margins, for others it means no recurrence after a few years, and for others it's long-term survival. So when you see numbers, it helps to check what exactly is being measured.
If you or someone you know is facing this, a few practical questions to ask the care team: what stage the cancer is, whether lymph nodes will be checked during surgery, whether breast-conserving surgery is an option or if mastectomy is really needed, and what the plan is after surgery (chemo, hormone therapy, radiation). Since radiotherapy may not be available locally, it's also good to ask early how that would be arranged if it's needed, so there are no delays.
Getting a second opinion is also pretty normal for a decision like this, and most doctors won't mind. Hope this helps a little.
