This is a retrospective, single-center, observational study evaluating patients diagnosed with unruptured intracranial internal carotid artery (ICA) aneurysms treated with an FD stent between January 1, 2014, and January 1, 2020, at the Fundación Oftalmológica de Santander–Clínica Ardila Lülle. We analyzed and anonymized patient information that may identify a patient from clinical records, medical consultations, and follow-up imaging records of the patients enrolled. Patients over 18 years of age with a diagnosis of unruptured small (<5 mm), medium (5–10 mm), large (10–25 mm), or giant (>25 mm) aneurysms of the intracranial internal carotid segment treated with FDs in that period were included. In addition, 1-year digital subtraction angiography (DSA) results were mandatory to assess the occlusion rate. Incomplete data in the database, patients with no follow-up, and a history of aneurysm rupture less than 30 days before treatment were excluded.