- For MBC Subject Set only Confirmed metastatic breast cancer patient with at least one measurable solid tumor according to the RECIST guideline Starting a new line of systemic therapy which is recommended in the Chinese edition of NCCN Clinical Practice Guidelines in Oncology Breast Cancer Guideline 2009 line of chemotherapy should be over 3 ECOG performance grade of 0 to 2 Life expectancy over 3 months