Analysis of morphology of the basilar-superior cerebellar
Journal Title: Nepal Journal of Neuroscience - Year 2009, Vol 6, Issue 1
Abstract
Morphological information of aneurysms is important for performing surgical clipping or endovascular coiling. Basilar-superior cerebellar artery (BA-SCA) aneurysms are rare types of intracranial aneurysms. There have been few studies of the morphological features of BA-SCA aneurysms. In this study, we retrospectively analyzed the morphology of 24 BASCA aneurysms from 24 patients. Various dimensions of aneurysm including width (W), height (H) and neck (N) of the aneurysms; H/N, W/N and W/H ratios and the angles formed between the posterior cerebral artery (PCA) and SCA were measured. BA-SCA aneurysms were classified according to the location of the aneurysm neck. Aneurysm size, ratios, angle and type were compared between ruptured and unruptured aneurysms. The average measurements of the BA-SCA aneurysm domes were as follows: height = 4.7 mm; width = 5.1 mm; and neck = 2.9 mm. The average size ratios of the BA-SCA aneurysms were: H/N =1.56; W/N = 1.74; and W/ H = 1.15. The average PCA-SCA angle of the aneurysms was 111.9 degrees. Approximately 70% of the necks of the BA-SCA aneurysms were partially located on the SCA. There was not a significant difference between ruptured and unruptured BA-SCA aneurysms, in size, angle, and neck location. Regardless of ruptured or unruptured status, BA-SCA aneurysms tended to have width more than height with the neck partially located on the SCA.
Authors and Affiliations
Shigeyuki Sakamoto, MD
Keywords
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