Serial Imaging Surveillance for Patients With a History of Intracranial Aneurysm: Risk of De Novo Aneurysm Formation

Neurosurgery
Joanna Y WangJudy Huang

Abstract

Although rare, de novo intracranial aneurysms (DNIAs) may develop in patients with a history of intracranial aneurysms (IAs). To evaluate the benefit of routine radiographic screening for DNIAs. Data for 2153 patients with IAs were retrospectively analyzed. A total of 185 patients underwent screening for DNIAs at frequent intervals. Overall, DNIAs were detected in 26 patients (1.2%). Of the 185 patients with surveillance, DNIAs developed in 9 (4.9%). The risk of DNIA detection was 1.14% per person-year of follow-up (95% confidence interval: 0.6%-2.2%). Patients with imaging follow-up had a significantly higher rate of DNIA detection compared with patients without regular imaging surveillance (4.9% vs 0.86%; P < .001), but surveillance was associated with smaller lesions (with surveillance: 3.8 ± 1.8 mm, without: 7.0 ± 4.4 mm, mean ± standard deviation; P = .026). A unimodal distribution of time to detection was found in those with surveillance, with a peak between 0 and 2 years. There was a trend toward an association of cigarette smoking and DNIA detection within 10 years (P = .06); 6 of the 26 patients (23.1%) with DNIAs had a history of cigarette smoking, with all 6 patients continuing to smoke up to the detection of the DNI...Continue Reading

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Mar 5, 2016·Neurocirugía·Pedro David Delgado LopezVicente Martín Velasco
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Nov 17, 2016·Journal of Neurosurgical Sciences·Lorenzo RinaldoGiuseppe Lanzino

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