RecruitingPhase 1Biological interventionA Study Assessing if it is Safe and Possible to Treat Brain Cancer Patients With Immunotherapy Before They Receive the Standard Treatment.WinGlio is a phase I study investigating neoadjuvant (before surgery) ipilimumab ( a type of immunotherapy drug) in patients with newly diagnosed glioblastoma (a form of brain cancer). Participants will receive up to 2 cycles of ipilimumab prior to the standard of care treatments for this patient group which can include debulking surgery and chemoradiation. The aim of giving the ipilimumab to the participants is to see if it is safe to treat patients with this condition with ipilimumab and also to see if the drug helps to reduce or control the patient's disease.