I am not sure what poorly differentiated an infiltrating mean. I have been told that I have IDC or invasive ductal cancer. I was shocked when I found that out last August or was it early September. I was immediately put on a national a drug that stops the feeding of the tumor which is estrogen and progesterone or the hormones. It definitely decreased the size of my tumor. It seemed like a miracle drug until the end of the three and a half months and I had to stop it because the side effects were just too much. The main one being fatigue. Bones hurt and I was miserable. My doctor and I both agreed to go off and asked us all and now my surgery for a lumpectomy is coming up May 24th. Because both tumors in both breasts have decreased in size and there is no metastasis or lymph nodes involved I am only getting a lumpectomy. May 14th I go in for another complete checkup which I have been having all along, about every 2 months or 3 months depending upon our schedules. My prognosis is good because it hasn't spread. I am anxious to have this whole thing done with. I chose that date because of astrology and tarot card reading by myself. I know, everybody thinks I'm crazy. But I have reasons for my choice. I hope I chose right.