The purpose of this study is to assess the activity of Sym004, a recombinant antibody mixture that specifically binds to EGFR, in patients diagnosed with recurrent glioblastoma whose tumor is EGFR amplified. The primary objective is to assess the activity of Sym004 in patients with recurrent glioblastoma that are either non-bevacizumab failures (Cohort 1) or who have previously failed bevacizumab (Cohort 2), in terms of 6-month progression-free survival (PFS6). Secondary objectives include: 1. Determine the safety of Sym004 in recurrent glioblastoma (GBM) patients; 2. Estimate response rate (RR) within the two cohorts of recurrent GBM patients; 3. Describe overall survival (OS) within the two cohorts of recurrent GBM patients; 4. Describe overall median progress free survival (PFS) within the two cohorts of recurrent GBM patients.~This is a phase 2 study that will accrue patients with WHO grade IV recurrent malignant glioma (glioblastoma or gliosarcoma) in two cohorts to assess the efficacy of Sym004. Both cohorts will accrue simultaneously, with 36 subjects in Cohort 1 and 25 subjects in Cohort 2 at a dose of 18 mg/kg Sym004 given intravenously every 2 weeks. A treatment cycle will be 4 weeks.~Twenty-five subjects have been treated at the 18 mg/kg dose of Sym004. Beginning in August 2017, the dose of Sym004 will be increased to 24 mg/kg. Sixty-five additional subjects (36 in Cohort 1 and 29 in Cohort 2) will be treated at the new dose level.
The purpose of this study is to assess the activity of Sym004, a recombinant antibody mixture that specifically binds to EGFR, in patients diagnosed with recurrent glioblastoma whose tumor is EGFR amplified. This is a phase 2 study that will accrue patients with WHO grade IV recurrent malignant glioma (glioblastoma or gliosarcoma) in two cohorts to assess the efficacy of Sym004.