Is the middle cerebral artery bifurcation aneurysm affected by morphological parameters of bifurcation?

In this study, the relationship between the presence of aneurysm and various morphological parameters of aneurysm-related arteries was evaluated in patients with saccular mıddle cerebral artery (MCA) bifurcation aneurysm. The archival images of 74 patients (62.2% women) were evaluated retrospectively. In this study, the angle between the ipsilateral MCA M1 segment and the dominant truncus (Φ1), the angle between the M1 segment and the recessive truncus (Φ2), and the bifurcation angle (Φ1 + Φ2) were compared. Bilateral internal carotid artery (ICA), MCA M1 segment, dominant and recessive truncus diameters and this diameters ratios were compared with the aneurysmal side and the contralateral side without aneurysm. When the dominant truncus, recessive truncus angles and bifurcation angle were compared, a significant difference was found on the aneurysmal side (p <0.0001). In the ROC analysis, when the bifurcation angle of 147.5 ° was accepted as the limit value, 78.4% sensitivity, 79.7% specificity, 78.4% positive predictive value and 78.7% negative predictive value were determined (AUC = 0.85). Our study of the morphological features of arteries associated with MCA bifurcation aneurysms showed that the presence of MCA aneurysms was significantly associated with large bifurcation angles. PMID: 32827308 [PubMed - as supplied by publisher]
Source: Folia Morphologica - Category: Anatomy Tags: Folia Morphol (Warsz) Source Type: research