Size and Location of Ruptured Intracranial Aneurysms

Abstract

Objective : The aim of study was to review our patient population to determine whether there is a critical aneurysm size at which the incidence of rupture increases and whether there is a correlation between aneurysm size and location. Methods : We reviewed charts and radiological findings (computed tomography (CT) scans, angiograms, CT angiography, magnetic resonance angiography) for all patients operated on for intracranial aneurysms in our hospital between September 2002 and May 2004. Of the 336 aneurysms that were reviewed, measurements were obtained from angiograms for 239 ruptured aneurysms by a neuroradiologist at the time of diagnosis in our hospital. Results : There were 115 male and 221 female patients assessed in this study. The locations of aneurysms were the middle cerebral artery (MCA, 61), anterior communicating artery (ACoA, 66), posterior communicating artery (PCoA, 52), the top of the basilar artery (15), internal carotid artery (ICA) including the cavernous portion (13), anterior choroidal artery (AChA, 7), A1 segment of the anterior cerebral artery (3), A2 segment of the anterior cerebral artery (11), posterior inferior cerebellar artery (PICA, 8), superior cerebellar artery (SCA, 2), P2 segment of the posterior cerebral artery (1), and the vertebral artery (2). The mean diameter of aneurysms was 5.47±2.536 mm in anterior cerebral artery (ACA), 6.84±3.941 mm in ICA, 7.09±3.652 mm in MCA and 6.21±3.697 mm in vertebrobasilar artery. The ACA aneurysms were smaller than the MCA aneurysms. Aneurysms less than 6 mm in diameter included 37 (60.65%) in patients with aneurysms in the MCA, 43 (65.15%) in patients with aneurysms in the ACoA and 29 (55.76%) in patients with aneurysms in the PCoA. Conclusion : Ruptured aneurysms in the ACA were smaller than those in the MCA. The most prevalent aneurysm size was 3-6 mm in the MCA (55.73%), 3-6 mm in the ACoA (57.57%) and 4-6 mm in the PCoA (42.30%). The more prevalent size of the aneurysm to treat may differ in accordance with the location of the aneurysm.

Risk Factors and Morphological Differences of Ruptured Saccular Aneurysm in Different Sites of Anterior Circulation in Patients Presenting with Subarachnoid Haemorrhage

“…A Korean study also found the average size of aneurysm 6.15±1.3. Average Size of aneurysm found in other study was 7.20±4.30 35 , 5.59±2.79 36 . The size of ACom aneurysm was 6.12±2.7, PCom aneurysm was 6.5±2.4 and MCA aneurysm was 7.79±.71.…”

Intracranial aneurysm segmentation in 3D CT angiography: method and quantitative validation

“…For both the anterior and the posterior circulation 1 mm images with 0.6 mm overlap were reconstructed with a FOV of 100 mm. (6) where S Auto represents the automated segmentation and S Man represents manual segmentation.…”

“…Multiple factors can have an effect on the rupture risk of the aneurysm such as environmental factors (e.g. smoking, hypertension and alcohol consumption) [1], size [3], [4], [5], [6], [7] and shape [8], [9], [10].…”

Management paraophthalmischer Aneurysmen

“…Paraophthalmische Aneurysmen repräsentieren ungefähr 0,5 % aller rupturierten Aneurysmen [4,5]. Wie andere intradurale Aneurysmen stellen sie einen Risikofaktor für das Auftreten einer Subarachnoidalblutung dar, auch wenn einzelne Studien die Vermutung nahelegen, dass das Blutungsrisiko bei paraophthalDie Ergebnisse wurden in einem Vortrag auf dem DOG-Kongress 2016 in Berlin präsentiert.…”