Bevacizumab Plus Vinorelbine in Treating Patients With Stage IV Breast Cancer

OBJECTIVES: I. Determine the complete and partial response rates in patients with stage IV breast cancer treated with concurrent bevacizumab and vinorelbine. II. Determine the side effects of this regimen in these patients. III. Determine the time to disease progression in patients treated with this regimen. IV. Determine the time on study (a reflection of time to progression, treatment-related side effects, and patient preference) of patients treated with this regimen. V. Assess urine protein/creatinine ratio and serum complement levels as screening measures for renal injury in patients treated with bevacizumab. OUTLINE: This is a multicenter study. Patients receive bevacizumab IV over 30-90 minutes once every other week and vinorelbine IV over 6-10 minutes once weekly for 8 weeks. Treatment repeats every 8 weeks for 4 courses in the absence of disease progression or unacceptable toxicity. Patients with complete or partial response or stable disease after completion of the fourth course may receive additional courses of concurrent bevacizumab and vinorelbine administered once every other week or may continue therapy on the schedule as above. PROJECTED ACCRUAL: A total of 56 patients will be accrued for this study within 1 year.