BACKGROUND AND PURPOSE: The diagnostic accuracy for @entity438 has increased, and incidental asymptomatic @entity439 have come to represent a substantial clinical burden because of their controversial natural history. However, their prevalence may be attributable to variations in evaluation methods and demographics. We therefore describe the prevalence and magnetic resonance angiography (MRA) findings of incidental @entity438 over a 5-year period at a single large-volume center. METHODS: MRA images from 18,237 @entity1 obtained between January 2001 and December 2005 were retrieved from the radiology report database. @entity1 diagnosed with incidental @entity438 were identified and their MRA data were reviewed. Imaging and clinical follow-up data were evaluated. RESULTS: During the study period, 366 incidental @entity438 were identified in 330 @entity1 (prevalence, 1.8%; 95% confidence interval, 1.63%-2.01%; 115 @entity1 and 215 @entity1 ; age range, 22-82 years; median age, 63 years). The prevalence was higher in @entity1 (215/8,112) than in @entity1 (115/10,125; P=0.02). The prevalence increased with age in @entity1 (P<0.01), but not in @entity1 (P=0.30). @entity439 size ranged from 1.5 mm to 13 mm, with a median size of 4 mm. The most common location was the bifurcation of the middle cerebral artery (131/366; 35.8%). CONCLUSIONS: Our real world experience indicated a slightly lower overall prevalence of incidental @entity438 than previously reported. The prevalence increased with age in @entity1 but not in @entity1 .

Incidental XXXX on Head MR Angiography: 5 Years' Experience at a Single Large-Volume Center.

@entity1 :: ('9606', 'Species') :: ['women', 'Patients', 'patients', 'men'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysms', 'Aneurysm'] @entity438 :: ('MESH:D002532', 'Disease') :: ['intracranial saccular aneurysms', 'unruptured intracranial aneurysms']
@entity439 :: (MESH:D000783,Disease) :: ['Saccular Aneurysms']
