20.500.12556/DiRROS-29839 Hypoplastic arteries of the cerebral arterial ring in the blind spot of computed tomography angiography Background: Some variations of the cerebral arterial circle (CAC) are associated with an increased risk for the development of various pathological conditions. This paper aimed to determine the prevalence of hypoplastic arteries of CAC and to emphasize the limited possibility of their visualization by computed tomography angiography (CTA). Materials and methods: The research was performed on 400 adult cadavers by macro- and microdissection of the cerebral arteries. Each case was photographed and the diameter of the arteries was measured digitally, by analyzing photographs of the bases of the brain in the ImageJ program. Results: The largest prevalence of artery diameter <1mm (<0.6mm) in CAC had the posterior communicating artery (PCoA). PCoA on the left side was hypoplastic in 44.9% (11.4%) of cases, while the same artery on the right side was hypoplastic in 44.3% (6.6%) of cases. The posterior cerebral artery was hypoplastic on the left side in 3% (0.6%) and on the right side in 4.2% (0.6%) of cases. The anterior cerebral artery had a hypoplastic caliber only on the right side in 2.4% (0.6%) of the cases, while the internal carotid arteries did not have a diameter <1mm in any case. The anterior communicating artery showed the greatest variability in morphology. Studies on CTA describe the occurrence of aplasia in a statistically significantly higher percentage, and the occurrence of hypoplastic arteries in a statistically significantly lower percentage compared to studies on cadavers. Conclusions: Due to significant differences between cadaveric and radiological studies, it is necessary to analyze their results regarding arterial hypoplasia and aplasia separately. A diameter of less than 1 mm has been suggested as a criterion for arterial hypoplasia. adult human cadaver brain base hypoplasia computed tomography angiography cerebral arterial circle truplo odraslega človeka možganska baza hipoplazija računalniška tomografija angiografija možganski arterijski krog true false true Angleški jezik Slovenski jezik Neznano 2026-06-08 11:57:15 2026-06-08 11:57:15 2026-06-09 03:49:20 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 23. 9. 2024; str. 589-596 no. 3, [article no.] 96767 Vol. 83 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 616.1 1644-3284 10.5603/fm.96767 208557315 RAZ_Trandafilovic_Milena_2024.pdf RAZ_Trandafilovic_Milena_2024.pdf 1 750ED4B8208A78463898DE28DE6726B5 4e8a61b7ba0276170c2ebdd4fd15849cca3d26838cdc7075594ec7b04a33b287 94ade8f0-6320-11f1-9215-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44882 https://journals.viamedica.pl/folia_morphologica/article/view/96767/74052 1 70933f85-6320-11f1-9215-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44881 Univerzitetni klinični center Ljubljana 0 0 0