case_images: PMC10906934_01
case_images: The base of the brain and the circle of Willis. The internal carotid artery (ICA), posterior cerebral artery (PCA), basilar artery (BA), and A1 or first segment of the anterior cerebral artery (ACA) are atherosclerotic (yellowish hue). The anterior communicating artery (ACoA) is duplicated, featuring anterior (A) and posterior (P) horns, with a small vertical bridging artery connecting the two horns. Notably, the posterior horn exhibits severe atherosclerosis. The right (R) and left (L) sides are indicated. A2, the second segment of the ACA; M1, the first segment of the middle cerebral artery; and the posterior communicating artery (PCoA).
case_images: cureus-0016-00000053321-i01.jpg
case_images: PMC10906934_01_cureus-0016-00000053321-i01.jpg
case_images: FIG1
case_images: A duplicated ACoA was noted, without other significant arterial variations in the circle of Willis (Figure 1).