###Human: Chemotherapy sessions for breast cancer has been increased to 12. Why? ###Assistant: Hello. It is called neoadjuvant chemotherapy. So with chemotherapy, the size of the tumor is reduced significantly to make breast tumor operable. She has completed four cycles every 21 days, and now they will start the second phase of weekly chemotherapy (a new drug) for 12 weeks as per international recommendations. After completion of the second phase, chemotherapy she will be restaged before surgery. It would be better if you would have attached CT scan, pathology (biopsy) reports also.