Abstract
The purpose of this study was to correlate the morphology of giant intracranial aneurysms (GIA) with their clinical presentation. Eighty patients with GIA, 14 males and 66 females, were studied. Univariate and multivariate analyses were made to test the associations between morphological and clinical features. The main locations of the unruptured GIA included the carotid cavernous segment, and for the ruptured GIA, the most frequent were the carotid supraclinoid and middle cerebral arteries. There was a significant association among communicating arteries (CA) of “bad” quality and presence of thrombus and calcification (TC). The risk of rupture is 8 times higher in patients with CA of “bad” quality and 11 times higher in patients without TC. GIA are more frequent in the cavernous segment. There is a high rupture risk in the middle cerebral artery. CA of “bad” quality are associated with TC. The rupture risk is significantly higher in patients without TC.
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We would like to thank Prof. José A. Cordeiro, PhD, for statistical assistance and Prof. Renato B. Araujo, PhD, for assistance with data analysis and manuscript preparation.
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Yavor Enchev, Varna, Bulgaria
Santos et al. analyzed the correlation between the morphology of GIA with their clinical presentation in a series of 80 patients. They applied univariate and multivariate statistical tests. Expectedly, most frequently, the unruptured GIA were located at the carotid cavernous segment and the ruptured GIA at the carotid supraclinoid and middle cerebral arteries. The authors found out that the risk of rupture is 8 times higher in patients with CA of the so-called “bad” quality and 11 times higher in patients without TC. At this point, by my opinion, there exists a very interesting discrepancy between both facts: first, that the risk of rupture is eight times higher in patients with CA of the so-called “bad” quality and, second, the statement that “there was a significant association, suggesting that deficiency patterns of communicating arteries are related to the formation of thrombus and calcification, possibly related to unidirectional flow patterns [11, 20],” page number 7 in the manuscript. So, the so-called “bad” quality of CA is beneficial for the TC formation, which is protective, but at the same time, it is associated with several times higher risk for rupture. The analysis of this fact, unfortunately not obtainable in the paper, probably will be an object of future studies. Why in some patients the CA of the so-called “bad” quality caused GIA rupture and in other patients are related with TC formation seems to be an intriguing unanswered question. Other important authors' conclusions were that GIA are more frequent in the cavernous segment and that there is a high rupture risk in the middle cerebral artery.
Divaldo Camara Junior, Recife, Brazil
The authors presented an excellent paper with valuable information regarding giant intracranial aneurysms. It can be inferred from the data presented that the risk of rupture is higher in bad-quality communicating arteries. The latter were also significantly associated with presence of thrombus and calcification. On the other hand, the risk of rupture of GIA is 11 times higher in patients without thrombus and calcification. Therefore, other studies are necessary to precisely evaluate the risk of rupture and understand the role of the aforementioned three parameters (quality, thrombus/calcification, status of rupture) as well as other morphological features of GIA. Whether the term “good- and bad-quality arteries” will be of practical use is a matter for the future.
Kazuhiro Hongo, Matsumoto, Japan
This is a paper on the relation of the morphology and clinical presentation of the giant intracranial aneurysms. They concluded that giant intracranial aneurysm in the region of the middle cerebral artery showed high risk of rupture and that with regard to vascular pattern of communicating arteries, these arteries are associated with presence of thrombus and calcification. Also, they mentioned that the rupture risk is significantly higher in patients without thrombus and calcification in relation to those with thrombus and calcification.
They conducted meticulous analyses using univariate and multivariate statistical tests. The results seem quite reasonable. To select an appropriate treatment option in each patient with a giant intracranial aneurysm, a detailed neuroimaging study should be examined; however, the information the authors demonstrated must be useful to know the behavior of the giant aneurysm in general.
NSR-09-11-0180.R1
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dos Santos, M.L.T., Spotti, A.R., dos Santos, R.M.T. et al. Giant intracranial aneurysms: morphology and clinical presentation. Neurosurg Rev 36, 117–122 (2013). https://doi.org/10.1007/s10143-012-0407-0
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DOI: https://doi.org/10.1007/s10143-012-0407-0