Hello Rene, well I'm glad you have come on this site as we are all in this journey together Happy Birthday by the way. I too had a 12mm lump aso grade 3 and I had a lumpectomy.The surgeon will remove it and surrounding tissue to get what's called a clear margin which means no cancer cells in that margin. Also he will remove your sentinel node from under your arm it's your soldier node when he suggests you read the early breast cancer info that is a GOOD thing. I had surgery a month rest them chemo every 3 weeks for 4 times you will have chemo too Rene because of the grade 3 don't hesitate to have it!!! another month rest then I would say you will have 6 weeks radiotherapy then may or may not have hormone therapy for 5 0r 10 years depending if your BC is hormone sensitive anyway take a big breath because it's do able keep in touch with your progress Christine xxxx and it is a Happy Birthday cos you got the bastard early xxxx