Hi, It is scary having cancer, and natural to want to be sure all the cancer has been chopped out. But there are a couple of things that I learnt about when I was presurgery that I found helpful and although it is also scary, I would like to share it with you so you can make your decisions on the basis of knowledge not the assumptions many people make.
Susan Komen Cancer website has a very good section on deciding between a lumpectomy and a mastectomy ot this URL:
http://ww5.komen.org/BreastCancer/DecidingBetweenMastectomyandLumpectomy.html
which you might find helpful to discuss with your surgeon.
in deciding whether to offer you a lumpectomy with radiotherapy (you always have both if you have a lumpectomy) or a mastectomy, they consider how big the tumor is, whether there is only one or more, if you have any lymph node involvement etc.
If the cancer is singular, small (which I think means under about 1.5 cm), not adhering to the chest wall, and without any obvious lymph node involvement, they can often have a very good chance of removing the whole thing with clear margins leaving you a breast that is still the shape you are used to and comfortable with.And depending on what they find in surgery and in the pathology report on the tumor and sentinel lymph node etc, there is a good chance then that you will not need any further surgery and will not have a local recurrence, or a metastases elsewhere in your body.
My daughter had a possibly cancerous lump under 1cm, and was glad to only have a lumpectomy. My cancer was 2.2 IDC in a 6cm high-nuclear field of DCIS, and I was told a mastectomy was my only choice.
But the Susan Komen page does say that there is a slightly higher risk of recurrence with lumpectomy. People who have lumpectomy and radiotherapy are therefore monitored very closely and any recurrence is likely to be picked up quickly and treated very quickly so this process can be shone not to affect survival rate at all. So if you have a lumpectomy, esp for a medium to large cancer, you have to understand that it is not a sign that you have any increased risk of a bad outcome. You cannot let this frighten you. All it means is you took the second treatment path that a few of the people who have lumpectomies end up taking.
One point that all of us here have to deal with is that there are no guarantees that any particular treatment will stop our cancer from recurring. Even if you had a double mastectomy with all your lymph nodes removed and radiotherapy all around the area, it could still come back because recurrence is not often caused by cancer cells left behind. We all have to live with that possibility of recurrence and to learn how to live well and full of hope and happiness despite this fact. And we do, and you will too.
A big problem researchers are discovering that there are stem-cell-like cancer cells inside breast cancers that can that can change between forms so they seem quite innocent, and back into a cancer seeding-form. They can move out into the lymph fluid or the blood, can stay in their innocent form in the blood or lymph and not be found. At some time later, they can find a suitable spot in liver or lungs etc and start to form a new tumor.
Researchers are learning how to find these cells, and how they work, and how to stop them. They are developing vaccines and other approaches, and in time to come, there will be many new and very effective ways to deal with them. I read that Herceptin and its related treatments often seems to have some effect on these cells so even some current treatments can work on them.
So surgery is only half the story. This is why lumpectomies have radiotherapy with them. And why so many of us have chemotherapy to help clear out any rogue cancer cells possible. But it is also why despite that, an unlucky few still get recurrences, and why at present they cannot stop this happening.
I hope you get a chance to discuss things with the surgeon and to be sure you are happy with the choices you make together, and that it all goes well from here on.
best wishes