Conservative management of 661 patients with unruptured intracranial aneurysms: an observational study over 4 decades

The identified PHASES and ELAPSS score thresholds may help identify high-risk patients with UIAs. Individual aneurysm rupture risks must be carefully weighed against center-specific treatment outcomes. For conservatively managed UIAs, lifelong regular follow-up is recommended and seems to be especially important in the first 10 years after diagnosis.