case_images: PMC8088532_01
case_images: Preoperative left internal carotid angiograms showing anomalous arteries arising from the internal carotid arteries, which and run anteromedially along the frontal base and making a hairpin-pin bend, and a saccular aneurysm is seen on the hairpin-pin bend, lateral view (a) and oblique view (b).
case_images: SNI-12-147-g001.jpg
case_images: PMC8088532_01_SNI-12-147-g001.jpg
case_images: F1
case_images: Based on this characteristic course, we suspected it to be a PPOA [Figure 1a]. No other abnormalities causing bleeding were observed [Figure 1b].
case_images: (a) Preoperative angiograms revealing an aneurysm with oblique view (b) postoperative angiograms showing no filling of the aneurysm.
case_images: SNI-12-147-g002.jpg
case_images: PMC8088532_01_SNI-12-147-g002.jpg
case_images: F2
case_images: Transend EX platinum (Stryker, Kalamazoo, MI, USA). A cage was formed with Axium PRIME 3D (Medtronic, Minneapolis, MN, USA). Three coils were inserted into the aneurysm, and nearly complete occlusion was achieved [Figure 2a and b].