The Efficacy and Safety of PEG-rhG-CSF（Pegylated Recombinant Human Granulocyte Colony Stimulating Factor)in Patients With Breast Cancer Who Were Treated With Intensive Chemotherapy

Inclusion criteria

1.18-65 years old, gender no limited.

2.Breast cancer diagnosed by pathology.

3.Did not receive chemotherapy previously and plans to receive 4 cycles intensive EC (epirubicin, cyclophosphamide) treatment.

4.No obvious blood system disease, ANC(absolute neutrophil count)≥ 1.5 × 10^9/L, PLT（Platelet）≥80×10^9 /L, Hb（hemoglobin）≥75g/L, WBC（White blood cell ）≥3×109/L, and no bleeding tendency.

5.KPS (Karnofsky performance status) score≥70.

6.Expected survival≥3 months.

7.Written informed consent are acquired.

Exclusion criteria

• Severe or uncontrolled infection.
• Sensitive to the product or other genetically engineered biological products from Escherichia coli strains.
• Mental or nervous system disorders.
• Severe heart, lung and central nervous system disorders.
• Pregnant or lactating women.
• TBIL(total bilirubin ), ALT（alanine aminotransferase）,AST（glutamic-oxalacetic transaminase） > 2.5×ULN（upper limit of normal）; if it were caused by liver metastases, TBIL, ALT,AST >5×ULN.
• Cr（creatinine） >1.5×ULN.