Prior to my lumpectomy, ultrasound indicated a 2.1 cm tumor. However, it turned out to be two side-by-side tumors, one measuring 1.1 cm and one 1.0 cm. My breast surgeon said she'll discuss with oncologist to determine staging; her view is that since counting both lumps together just puts it a whisker into Stage 2, she'd go with looking at only the larger, and classifying as Stage 1 invasive ductal cancer. My question: Is there a best practice or guideline to determine staging in this kind of situation, or is it the oncologist/surgeon's experience coupled with other info from pathology? My other pathology results include no node involvement or vascular invasion identified, histologic grade 2, ER+/PR+ and HER2Neg.
Also, on my pathology report, my S-Phase Faction is 7.1% marked "borderline." I can't find a lot of info about the scale being used, other than that lower is better than higher. Can you tell me what the range is, i.e., 1- 10?
Thanks so much -- I want to ask right questions when I meet with my oncologist to discuss my prognosis and treatment, and this will be a big help.