Inclusion Criteria:

- Histologically confirmed diagnosis of non-small cell lung carcinoma of non-squamous
histology

- AJCC stage IIIB or Stage IV

- Measurable disease by RECIST criteria, and must have at least one target lesion 1cm
or greater in diameter for optimal perfusion CT scanning

- No prior chemotherapy treatment or VEGF inhibitor treatment, although prior treatment
with EGFR inhibitors will be allowed

- 18 years of age or older

- Adequate bone marrow, renal and liver function as outlined in the protocol

Exclusion Criteria:

- Life expectancy of less than 12 weeks

- Current, recent (within 4 weeks of the first infusion of this study), or planned
participation in an experimental drug study

- Inadequately controlled hypertension

- Any prior history of hypertensive crisis or hypertensive encephalopathy

- NYHA Grade II or greater congestive heart failure

- History of myocardial infarction or unstable angina within 6 months prior to study
enrollment

- History of stroke, transient ischemic attack within 6 months prior to study
enrollment

- Symptomatic CNS metastases or newly diagnosed CNS metastases that have not yet been
definitively treated with radiation and/or surgery. Note that patients with a history
of CNS metastases or cord compression are allowed if they have been definitively
treated and are clinically stable. Maintenance steroids are allowed. Two weeks need
to elapse from the completion of radiation, or 4 weeks from surgery, before starting
avastin. Patients do have to remain clinically asymptomatic.

- Significant vascular disease

- Symptomatic peripheral vascular disease

- Evidence of bleeding diathesis or coagulopathy

- Major surgical procedure, open biopsy, or significant traumatic injury within 28 days
prior to study enrollment or anticipation of need for major medical surgical
procedure during the course of the study

- Minor surgical procedure, excluding FNA, core biopsy or placement of a vascular
access device, within 7 days prior to study enrollment

- History of abdominal fistula, gastrointestinal perforation, or intra-abdominal
abscess within 6 months prior to study enrollment

- Serious, non-healing wound, ulcer, or bone fracture

- Proteinuria at screening

- Pregnant or lactating

- Lung carcinoma of squamous cell histology

- History of hemoptysis within 3 months prior to study enrollment

- Current, on-going treatment with full-dose warfarin or its equivalent at the onset of
treatment

- Current or recent (within 10 days of enrollment) use of aspirin or chronic use of
other NSAIDs