Bevacizumab Plus mFOLFOXIRI as First-line Treatment for Patients With Unresectable Metastatic Colorectal Cancer

Inclusion Criteria: \- Histological or cytological documentation of adenocarcinoma of the colon or rectum. All other histological types are excluded. Subjects with metastatic colorectal cancer(CRC) (Stage IV). Subjects treated with oxaliplatin in an adjuvant setting should have progressed during or within 12 months of completion of adjuvant therapy. Subjects who have withdrawn from standard treatment due to unacceptable toxicity warranting discontinuation of treatment and precluding retreatment with the same agent prior to progression of disease will also be allowed into the study. Metastatic CRC subjects must have measurable or non measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST) criteria, version 1.1. Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1. Adequate bone marrow, liver and renal function as assessed by the laboratory required by protocol. Exclusion Criteria: \- Previous or concurrent cancer that is distinct in primary site or histology from colon cancer within 5 years prior to randomization. Significant cardiovascular disease including unstable angina or myocardial infarction within 6 months before initiating study treatment. Heart failure grade III/IV (NYHA-classification). Unresolved toxicity higher than CTCAE v.4.0 Grade 1 attributed to any prior therapy/procedure. Subjects with known allergy to the study drugs or to any of its excipients. Current or recent (within 4 weeks prior to starting study treatment) treatment of another investigational drug or participation in another investigational study. Breast- feeding or pregnant women Lack of effective contraception.