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In this retrospective study, the authors evaluated the prevalence and characteristics of intracranial aneurysms in patients with hereditary hemorrhagic telangiectasia with brain vascular malformations. In their study cohort of 180 patients with HHT and brain vascular malformations, the authors demonstrated that the prevalence of intracranial aneurysm in hereditary hemorrhagic telangiectasia is comparable with that in the general population without clear association with shunting brain vascular malformations.

This systematic review and meta-analysis found the incidence of new postprocedural DWI-detected ischemic lesions after endovascular treatment for intracranial aneurysms to be 47.0% (95% CI, 39.6%–55.8%), regardless of the endovascular procedure used. Studies have shown that almost half of these lesions are asymptomatic, and if small (<5 mm), these lesions have been shown to regress without negative effect on clinical outcome.