Size and location correlations with higher rupture risk of intracranial aneurysms

The purpose of this study was to investigate the impact of size and location of the intracranial aneurysm on rupture probability.

265 patients with diagnosis of intracranial aneurysms were admitted to the department from January 2012 to December 2013. The characteristic of aneurysm, such as median size, location, single and multiple aneurysms and presentation were retrospectively reviewed using cerebral angiography reports.

There were 265 patients admitted with the diagnosis of intracranial aneurysms, 193 with single and 72 with multiple aneurysms. Among them there were 197 women (74,3%) and 68 men (25,7%). The total number of aneurysms harbored by the patients with multiple aneurysms were 184. Among all patients 96 had ruptured aneurysm, most of them located at the AComA and the minority of ruptured aneurysms were located at the ICA and MCA, In most cases the size of ruptured aneurysm was smaller than 10 mm.

The location of an aneurysm is an important factor allowing to predict the rupture probability and to plan proper treatment. The size of the aneurysm is also very useful predictor especially correlated with the location but the impact on rupture probability still needs further examination.