Akademik Veri Yönetim Sistemi
FOLIA MORPHOLOGICA, cilt.85, 2026 (SCI-Expanded, Scopus)
Background: This study aims to evaluate the hypothesis that specific morphological characteristics of the parent artery are associated with posterior communicating artery (PComA) aneurysms. Arterial diameters and angles were measured using computed tomography angiography (CTA), comparing the aneurysmal and contralateral normal sides in patients with PComA aneurysms. Materials and methods: Patients who underwent brain CTA between 2014 and 2024 at our hospital were retrospectively analyzed. A total of 94 patients with unilateral PComA aneurysms were included. Measurements included the diameters of the proximal (ICA1) and distal (ICA2) segments of the supraclinoid internal carotid artery (ICA), PComA diameter, and angles between these arteries. Additionally, the P1 and A1 segments were evaluated for hypoplasia or aplasia. Measurements from the aneurysmal side were statistically compared with those from the contralateral normal side. Results: No statistically significant differences were observed in terms of PComA diameters. However, ICA1 (p = 0.007) and ICA2 (p < 0.001) diameters were larger on the aneurysmal side. The ICA-PComA angle was significantly lower on the aneurysmal side (53.0 degrees vs. 79.0 degrees, p < 0.001). Furthermore, significant associations were found between PComA aneurysm presence and ipsilateral P1 hypoplasia/aplasia (chi 2 = 8.865, p = 0.003), as well as contralateral A1 Conclusions: In our study investigating the morphological characteristics of parent arteries associated with PComA aneurysms, we demonstrated significant associations between the presence of PComA aneurysms and certain morphological features of the parent arteries, particularly ICA-PComA angles, ICA1 and ICA2 diameters, and the presence of ipsilateral P1 and contralateral A1 segment hypoplasia or aplasia. These findings are consistent with existing evidence suggesting that arterial morphological parameters influence local hemodynamics, thereby potentially contributing to aneurysm formation. (Folia Morphol 2026; 85: e01726041)