A Phase II Trial of AZD9291 (Osimertinib) With or Without Bevacizumab in Patients With EGFR Mutation Positive NSCLC and Brain Metastases

• Non-small cell lung cancer (NSCLC) with an activating EGFR mutation (exon 19 deletion, L858R point mutation, or any other mutation known to be associated with EGFR TKI sensitivity); presence of an activating EGFR mutation may be documented in tumor tissue or by plasma testing if performed in a Clinical Laboratory Improvement Act (CLIA)-certified laboratory

• No prior treatment with an EGFR TKI; patient may have received prior chemotherapy for early-stage or advanced disease but this is not required; prior immunotherapy is not allowed

• Patients must have at least one measurable CNS lesion that is asymptomatic, untreated, and does not require local therapy at the time of enrollment; measurable CNS disease is defined as a brain metastasis that can be accurately measured in at least one dimension (longest diameter to be recorded) as >= 5 mm (>= 0.5 cm) with brain magnetic resonance imaging (MRI); if the lesion is 5-10 mm in size and is the only measurable disease, MRI imaging must be performed with 1.5 mm slice thickness or less; a history of previously treated brain metastases is allowed, however any lesion present at the time of whole brain radiotherapy or included in the stereotactic radiotherapy field (or within 2 mm of the treated lesion) will NOT be considered untreated unless it is new or documented to have progressed unequivocally since treatment

• Patients are not required to have measurable systemic (i.e. non-CNS) disease; if present, measurable systemic disease must be able to be accurately measured in at least one dimension (longest diameter to be recorded for non-nodal lesions and short axis for nodal lesions) as >= 20 mm (>= 2 cm) with conventional techniques or as >= 10 mm (>= 1 cm) with spiral computed tomography (CT) scan, MRI, or calipers by clinical exam

• Eastern Cooperative Oncology Group (ECOG) performance status =< 2

• Life expectancy of greater than 3 months

• The use of anti-convulsants is allowed, as long as the patient is on a stable dose with no seizure activity for at least 2 weeks prior to initiating trial therapy

• Female subjects should be using highly effective contraceptive measures, and must have a negative pregnancy test and not be breast-feeding prior to start of dosing if of child- bearing potential or must have evidence of non-child-bearing potential by fulfilling one of the following criteria at screening:

• Post-menopausal defined as aged more than 50 years and amenorrheic for at least 12 months following cessation of all exogenous hormonal treatments

• Women under 50 years old would be consider postmenopausal if they have been amenorrheic for 12 months or more following cessation of exogenous hormonal treatments and with luteinizing hormone (LH) and follicle stimulating hormone (FSH) levels in the post-menopausal range for the institution

• Documentation of irreversible surgical sterilization by hysterectomy, bilateral oophorectomy or bilateral salpingectomy but not tubal ligation

• Fertile men should be willing to use barrier contraception during and for 4 months after AZD9291 (osimertinib), and fertile women must agree to use adequate contraceptive measures during and for 6 weeks after AZD9291 (osimertinib); fertile men and women must agree to use adequate contraceptive measures during study therapy and for at least 6 months after the completion of bevacizumab therapy; should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, the patient should inform the treating physician immediately

• Ability to understand and the willingness to sign a written informed consent document