2. phylum - (biology) the major taxonomic group of animals and plants; contains classes. phylum Pyrrophyta, Pyrrophyta-a division of lower plants comprising unicellular and biflagellate algae that form starchy compounds.. phylum - (biology) the major taxonomic group of animals and plants; contains classes. phylum Pyrrophyta, Pyrrophyta-a division of lower plants comprising unicellular and biflagellate algae that form starchy compounds.
1 Breast cancer in premenopausal women tends to be more aggressive, so chemotherapy is often part of the treatment plan. 2  Chemotherapy may be recommended for some women diagnosed with early-stage breast cancer if the cancer is hormone-receptor-negative and HER2-positive.For more information on the specific characteristics of each cancer stage, visit the Breastcancer.org Stages of Breast Cancer page.). Chemotherapy is used after surgery to remove the breast cancer to get rid of any cancer cells that may be left behind and to reduce the risk of the cancer coming back.
Chemotherapy (chemo) is the use of medicines or drugs to treat cancer. The thought of having chemotherapy frightens many people. But knowing what chemotherapy is, how it works, and what to expect can often help calm your fears. It can also give you a better sense of control over your cancer treatment.