case_images: PMC10860472_01
case_images: Axial brain non-contrast CT scan (A) showing a right capsulo-lenticular hematoma (white arrows) with ventricular flooding. CT angiography (B) showing the bilateral stenosis of the terminal portion of the internal carotid artery, middle and anterior cerebral arteries with a more pronounced lenticulostriate collateral network on the right side (red arrow), and abnormal collateral vessels from the branches of the external carotid artery on the left side (yellow arrow).
case_images: cureus-0016-00000052204-i01.jpg
case_images: PMC10860472_01_cureus-0016-00000052204-i01.jpg
case_images: FIG1
case_images: Cerebral angioscan showed the bilateral stenosis of the terminal portion of the internal carotid artery, middle and anterior cerebral arteries with a more pronounced lenticulostriate collateral network on the right side, and abnormal collateral vessels from the branches of the external carotid artery on the left side (Figure 1).
case_images: Cerebral DSA showing the stenosis of the terminal portion of the right internal carotid artery and its branches with an abnormal collateral network (red arrows) and a lenticulostriate aneurysm (yellow arrow).. It also shows the stenosis of the terminal portion of the left internal carotid artery (B and C) (white arrows) with abnormal collateral vessels from the branches of the external carotid artery (red arrows).. DSA: digital subtraction angiography
case_images: cureus-0016-00000052204-i02.jpg
case_images: PMC10860472_01_cureus-0016-00000052204-i02.jpg
case_images: FIG2
case_images: The patient subsequently underwent digital subtraction angiography (DSA) two days later, which confirmed the abnormalities found on the CT scan and also showed an aneurysm within the lenticulostriate network opposite the area of hematoma (Figure 2).