Unruptured intracranial aneurysm repair is the most commonly performed procedure for the prevention of hemorrhagic stroke. Despite efforts to regionalize care in high-volume centers, overall results have improved little 1).
The management of small unruptured incidentally discovered intracranial aneurysms (SUIAs) is still controversial.
Despite large trials supporting the management of small asymptomatic aneurysms, most neurosurgeons internationally chooses to treat them with surgery or endovascular means. Since clinicians use a number of factors beyond the maximum diameter when considering treatment options, future trials should consider these factors in their design 2).
Once a decision has been made to treat an intact aneurysm, the best treatment remains uncertain. Both surgical and endovascular management strategies are commonly performed for these lesions.
No one knows how best to manage these patients (an estimated 2—5% of the adult population), but with the increasing accessibility of non-invasive imaging, physicians are increasingly faced with the dilemma of what to do 3).
One stance maintains that the only acceptable rationale for a preventive treatment is randomised evidence that therapy does more good than harm. Thus, a randomised trial showing better outcomes for treated patients compared with conservatively managed patients would be necessary to justify invasive treatment of UIAs. However, this trial has not yet been successfully completed.
Posterior circulation in surgery, large aneurysms (>15 mm) in EVT, and stent- or balloon-assisted procedures in EVT were associated with the occurrence of complications. Poor clinical outcome (mRS of 3-6) was 0.8 % at hospital discharge.