1. FIGURE 2. Event-free survival of de novo intracranial aneurysm detection from date of treatment of initial aneurysms. Risk of DNIA formation was determined with the 185 patients with routine imaging surveillance. The event-free survival rate was 99.5% at 1 year, 97.5% at 2 years, 96.7% at 3 years, 95.8% at 4 and 5 years, 93.7% at 6 years, 90.6% at 7 years, and 77.7% at 12 years. DNIAs, de novo intracranial aneurysms.
From: Serial Imaging Surveillance for Patients With a History of Intracranial AneurysmRisk of De Novo Aneurysm Formation
Neurosurgery. 2015;77(1): doi: /NEU
Neurosurgery | © 2015 by the Congress of Neurological Surgeons

2. FIGURE 1. STROBE flowchart outlining inclusion and exclusion criteria
FIGURE 1. STROBE flowchart outlining inclusion and exclusion criteria. Two separate databases of patients with intracranial aneurysms) were used in this study: one database of patients who agreed to undergo routine imaging surveillance from 2000 to 2013 (n = 185) and another database of patients from 1991 to 2013 who did not undergo surveillance (n = 3234). AVMs, arteriovenous malformations; DNIAs, de novo intracranial aneurysms; IAs, intracranial aneurysms; SAH, subarachnoid hemorrhage.
From: Serial Imaging Surveillance for Patients With a History of Intracranial AneurysmRisk of De Novo Aneurysm Formation
Neurosurgery. 2015;77(1): doi: /NEU
Neurosurgery | © 2015 by the Congress of Neurological Surgeons

3. FIGURE 3. A, rate of de novo intracranial aneurysm (DNIA) detection per year. The number of patients with DNIAs detected in the patients with adequate imaging follow-up was calculated per year after initial aneurysm treatment. The risk of DNIA detection by year: first year: 0.5% (95% confidence interval [CI]: 0.1%-3.0%), second: 1.1% (95% CI: 0.3%-4.0%), third: 1.5% (95% CI: 0.5%-5.2%), fourth: 0.8% (95% CI: 0.2%-4.6%), fifth: 0%, sixth: 1.6 (95% CI: 0.4%-8.8%), seventh: 2.4% (95% CI: 0.6%-12.6%), eighth: 0%, ninth: 0%. Error bars represent 95% CIs. B, time to DNIA detection by patients with and without surveillance from the date of treatment of initial aneurysms.
From: Serial Imaging Surveillance for Patients With a History of Intracranial AneurysmRisk of De Novo Aneurysm Formation
Neurosurgery. 2015;77(1): doi: /NEU
Neurosurgery | © 2015 by the Congress of Neurological Surgeons

4. FIGURE 4. Bubble plot of size (millimeters) vs time to de novo intracranial aneurysm (DNIA) detection from date of treatment of initial aneurysms (years). Each bubble represents a patient who had a DNIA detected. Diameter of the circles corresponds to size of the lesion in millimeters. Bubbles with solid borders indicate those patients who underwent routine imaging surveillance, and bubbles with dashed borders indicate those patients who did not undergo routine surveillance. Bubbles with vertical lines indicate those patients who ultimately underwent treatment for their DNIA. Circles marked with an X designate patients who presented with subarachnoid hemorrhage from their DNIA.
From: Serial Imaging Surveillance for Patients With a History of Intracranial AneurysmRisk of De Novo Aneurysm Formation
Neurosurgery. 2015;77(1): doi: /NEU
Neurosurgery | © 2015 by the Congress of Neurological Surgeons

5. From: Serial Imaging Surveillance for Patients With a History of Intracranial AneurysmRisk of De Novo Aneurysm Formation
Neurosurgery. 2015;77(1): doi: /NEU
Neurosurgery | © 2015 by the Congress of Neurological Surgeons