1022. Analysis of 406 Mirror Intracranial Aneurysms: Anatomic Characteristics and Risk Factors
Authors: Alexandra Santos; Jefferson Rosi Junior, MD, PhD; Saul Almeida da Silva, MD; Ricardo Iglesio, MD; José Guilherme Caldas, MD, PhD; Manoel Teixeira, MD, PhD; Eberval Figueiredo, MD, PhD (Sao Paulo, Brazil)
Mirror Intracranial Aneurysms (MIA) are present in about 40% of patients diagnosed with multiple aneurysms, and it accounts for 5% of all intracranial aneurysms. They usually are a challenge to the neurosurgeon, many times requiring two different approaches. The aim of this study was documenting the incidence, size and location of MIA, as well as investigating possible risk factors.
We studied 1404 patients with intracranial aneurysms followed in the Hospital das Clinicas of the University of Sao Paulo, a referral hospital for treatment of cerebrovascular diseases in Brazil. Patients admitted from September 2009 to August 2018 were included. MIA was defined as one pair of aneurysms involving bilateral corresponding arteries. We divided patients according to sex, age, arterial hypertension, and habit of smoking.