“…5,52,78 Traumatic aneurysm is a rare complication of both penetrating 1,11,27,30,55 and nonpenetrating head injuries. 6,24,25,36,38,41,45,53,63,64,77 It is difficult to estimate the true incidence of cerebral TAs. Approximately 1% of all patients with cerebral aneurysms in the cooperative study 42,46 and in the Toronto General Hospital series 29,55,60 had a history of head trauma.…”