Jing Li, Presenter: Nothing to Disclose

Bi-Xia Shen, Abstract Co-Author: Nothing to Disclose

Chao Ma, Abstract Co-Author: Nothing to Disclose

Jianping Lu MD, Abstract Co-Author: Nothing to Disclose

This hospital-based study suggested a higher prevalence (8.8%) of unruptured cerebral aneurysms observed by three-dimensional contrast enhanced MRA than the results of previous reports. We also found the most common site of aneurysm is the carotid siphon, and most lesions (85.3%) had a maximum diameter of 3–7 mm in the patient cohort.

Contrast enhanced MRA can help overcome the limitations of other imaging techniques to clearly display the details of cerebral aneurysms. We investigated the prevalence of unruptured cerebral aneurysms by using three-dimensional contrast enhanced MRA in a tertiary comprehensive hospital in China.

The cases were prospectively recorded at our hospital between February 2009 and October 2010. Two observers independently analyzed all MRAs on a workstation to obtain the age-specific prevalence, sex-specific prevalence and characteristics of unruptured cerebral aneurysms.

Of the 3,993 patients (men:women = 2159:1834), 408 unruptured cerebral aneurysms were found in 350 patients (men:women = 151:199). The prevalence was 8.8% overall (95% CI, 8.0–10.0%), with 7.0% for men (CI, 6.0–8.0%) and 10.9% for women (CI, 9.0–12.0%). The overall prevalence of unruptured cerebral aneurysms was higher in women than in men (P<0.001) and increased with age in men and women. Prevalence peaked at age group 75–80 years. Forty two patients (11.7%) had multiple aneurysms, including 10 (2.9%) male patients and 32 (9.1%) female patients. The most common site of aneurysm was the carotid siphon, and most lesions (85.3%) had a maximum diameter of 3–7 mm.

Li, J, Shen, B, Ma, C, Lu, J, 3D CE-MRA for Imaging of Unruptured Cerebral Aneurysms: A Hospital-based Prevalence Study.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14013366.html