Management and outcomes following emergency surgery for traumatic brain injury - A multi-centre, international, prospective cohort study (the Global Neurotrauma Outcomes Study).

•An estimated 27 million traumatic brain injuries (TBIs) occur worldwide every year.•In certain cases, neurosurgical intervention for TBI is necessary and life-saving.•The timing and quality of surgery for TBI has long been known to dramatically affect outcome.•There is a paucity of data on outcomes following neurosurgery globally.•GNOS will compare outcomes following emergency surgery for TBI worldwide.