Oslo University Hospital is affiliated with the Faculty of Medicine of the University of Oslo and is one of the largest medical research institutions in Europe. Every year more than 700 patients are treated for brain tumours at the institution ranging across all treatment modalities. The hospital offers surgery with intraoperative MRI combined with advanced cognitive neuromonitoring, molecular diagnostics, advanced neuro-oncology in combinations with an early phase trial unit. Treatment is given as close to the patient as possible through a close collaboration with the regional hospitals and primary health care service.