Abstract 075: Treatment Trends and Clinical Outcomes of Endovascular Therapy for Pediatric Unruptured Intracranial Aneurysms

Abstract

Introduction Due to the relative rarity of unruptured intracranial aneurysms (UIA) in the pediatric population, evidence regarding treatment modalities and clinical outcomes remains limited. This study aims to characterize the utilization and clinical outcomes of endovascular therapy (EVT) and microsurgical clipping (MSC) for pediatric UIAs over a two‐decade interval using a large national registry. Methods Pediatric (< 18 years of age) UIA hospitalizations were identified in the National Inpatient Sample from 2002 to 2019. Temporal utilization and clinical outcomes were compared for treatment with EVT and MSC. Results Among 734 UIAs identified during the study period, 64.9% (n = 476) were treated with EVT. Utilization of EVT significantly increased during the study period from 54.3% (2002‐2004) to 78.6% (2017‐2019) (p = 0.002 by Cochrane‐Armitage test). Treatment with EVT did not differ as a function of increasing age, but was mostly highly utilized in the youngest age grouping [70.4% (0‐2 years), 64.0% (3‐12 years), 64.3% (13‐17 years); p = 0.578]. In comparison with those treated with MSC, pediatric patients treated with EVT demonstrated higher rates of favorable outcomes (discharge to home without services) (96.0% vs. 91.1%, p = 0.006), shorter durations of hospital stay (4.6 vs. 10.0 days, p < 0.001), and lower rates of ischemic or hemorrhagic procedural‐related complications (1% vs. 4%, p = 0.010). Conclusion A retrospective evaluation of nearly twenty years of population‐level data from the United States demonstrates increasing utilization of EVT for the treatment of pediatric UIAs with high rates of favorable outcomes and shorter hospital stays in comparison to those treated with microsurgery. However, limitations of available registry data (such as absence of radiographic parameters and aneurysm morphological characteristics) temper any definitive claims regarding treatment efficacy.