Uchino Akira, Saito Naoko, Yamane Fumitaka
Department of Diagnostic Radiology, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama, 350-1298, Japan.
Department of Endovascular Neurosurgery, Saitama Medical University International Medical Center, Hidaka, Japan.
Surg Radiol Anat. 2017 Nov;39(11):1289-1292. doi: 10.1007/s00276-017-1864-5. Epub 2017 May 9.
Anastomosis between the ophthalmic segment of the internal carotid artery and the A1-A2 junction of the anterior cerebral artery (ACA), described as carotid-ACA anastomosis or infraoptic course of the ACA, is rare and known to demonstrate right-sided predominance. We report a case of bilateral carotid-ACA anastomoses associated with bilateral ophthalmic arteries arising from the sphenoidal branch of the middle meningeal artery that were diagnosed by magnetic resonance (MR) angiography. Identification of rare arterial variations on MR angiography requires careful scrutiny of source images.
颈内动脉眼段与大脑前动脉（ACA）A1 - A2 交界处之间的吻合，被称为颈动脉 - ACA 吻合或 ACA 的视下走行，较为罕见，且已知右侧更为常见。我们报告一例双侧颈动脉 - ACA 吻合病例，该病例伴有双侧眼动脉发自脑膜中动脉蝶骨支，通过磁共振（MR）血管造影得以诊断。在 MR 血管造影上识别罕见的动脉变异需要仔细审视源图像。
