Hi Sharon,
My surgeon recommended a lumpectomy as he was convinced that only a small amount of tissue needed to be removed. Once the biopsy came back one margin wasn't clear and there were cancerous cells found away from the lump so I then had a mastectomy. I think surgeons like to try to preserve the breast if possible. It really is your decision and there is no right or wrong, only what feels comfortable with you. Hormone receptive means hormone therapy usually by way of a tablet once a day for at least 5 years. All the best with your decision and operation.