An Investigational Immuno-therapy Study of Temozolomide Plus Radiation Therapy With Nivolumab or Placebo, for Newly Diagnosed Patients With Glioblastoma (GBM, a Malignant Brain Cancer)

Inclusion Criteria

• Males and Females, age ≥ 18 years old
• Newly diagnosed brain cancer or tumor called glioblastoma or GBM
• Karnofsky performance status of ≥ 70 (able to take care of self)
• Substantial recovery from surgery resection
• Tumor test result shows MGMT methylated or indeterminate tumor subtype

Exclusion Criteria

• Biopsy-only of GBM with less than 20% of tumor removed
• Prior treatment for GBM (other than surgical resection)
• Any known tumor outside of the brain
• Recurrent or secondary GBM
• Active known or suspected autoimmune disease Other protocol defined inclusion/exclusion criteria could apply