This protocol addresses adults presenting with an unruptured intracranial aneurysm (UIA) located specifically in the posterior circulation — involving the vertebral, basilar, or posterior cerebral arteries and their branches (excluding the posterior communicating artery).
The aneurysm is unruptured and situated in the posterior circulation: vertebral, basilar, or posterior cerebral arteries and their branches. This anatomical location is a key determinant in the treatment approach. The posterior communicating artery is excluded from this scenario.
Endovascular treatment is the primary option to consider for this population. Under specific circumstances, a particular type of endovascular device may be employed when other occlusion options are not suitable.
DOI: 10.1177/23969873221099736
In adult patients with UIA in the posterior circulation we suggest endovascular treatment as the first option to consider.
In adult patients with UIA, we suggest flow diverting stents as a treatment option only if no other endovascular or microsurgical options to occlude the aneurysm (complete occlusion or neck remnant only) at a risk lower than the expected 5-year risk of rupture are available and if the risk of rupture outweighs the risk of treatment with flow diverting stents.
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