Sep 20, · Grade 1 or well differentiated (score 3, 4, or 5). The cells are slower-growing, and look more like normal breast tissue. Grade 2 or moderately differentiated (score 6, 7). The cells are growing at a speed of and look like cells somewhere between grades 1 and 3. Grade 3 or poorly differentiated (score 8, 9). Stage 0 Breast Cancer: Information & Options | CTCA.
Jan 01, · Breast Cancer Stages The stages are the number zero and the Roman numerals I, II, III, or IV (often followed by A, B, or C). In general, the higher the number, the more advanced the .