Bevacizumab Combined With Fractionated Stereotactic Radiotherapy for 1 to 10 Brain Metastases From NSCLC

This Phase II randomized study is to determine the efficacy and safety of Bevacizumab combined with fractionated stereotactic radiation therapy(FSRT) in patients with 1 to 10 brain metastases in non-small cell lung cancer by assessing the treatment response, neurological symptoms and quality of life.

Patients will receive Bevacizumab(7.5mg/kg, q3w, i.v.) before and after FSRT(40Gy in 10 fractions or 30Gy in 5 fractions) to the brain metastases. The primary endpoint was intra-cranial progression-free survival (IPFS). Secondary endpoints included overall survival (OS), progression-free survival (PFS), quality of life (QOL) scores, and toxicities.

Inclusion criteria

• aged ≥18 years old;
• histologically confirmed NSCLC;
• 1-10 BMs on contrast-enhanced MRI;
• stable extracranial disease status at the time of enrollment;
• Eastern Cooperative Oncology Group (ECOG) performance status score of 0-2;
• Normal function of organs and bone marrow within 14 days: Total bilirubin 1.5 times or less the upper limits of normal (ULN); AST and ALT 1.5 times or less the ULN; absolute neutrophil count≥ 500 cells/mm3; creatinine clearance rate(CCR) ≥45 mL/min; Platelet count≥50,000 cells/mm3; international normalized ratio(INR) ≤1.5，Prothrombin Time (PT)≤ 1.5 × ULN
• Informed-consent

Exclusion criteria

• Intracranial metastases needed surgical decompression
• Patients with contraindications for MRI
• Previous radiotherapy or excision for intracranial metastases
• The tumor has completely approached, encircled, or invaded the intravascular space of the great vessels (e.g., the pulmonary artery or the superior vena cava)
• A cavity over 2cm in diameter of primary tumor or metastasis
• Bleeding tendency or coagulation disorder
• Hemoptysis (1/2 teaspoon blood/day) happened within 1 month
• The use of full-dose anticoagulation within the past 1 month
• Severe vascular disease occurred within 6 months
• Gastrointestinal fistula, perforation or abdominal abscess occurred within 6 months
• Hypertensive crisis, hypertensive encephalopathy, symptomatic heart failure (New York class II or above), active cerebrovascular disease or cardiovascular disease occurred within 6 months
• Uncontrolled hypertension (systolic > 150mmHg and/or diastolic > 100mmHg)
• Major surgery within 28 days or minor surgery or needle biopsy within 48 hours
• Urine protein 3-4+, or 24h urine protein quantitative >1g
• Severe uncontrolled disease
• Uncontrollable seizure or psychotic patients without self-control ability
• Women in pregnancy, lactation period
• Other not suitable conditions determined by the investigators