Uchino Akira, Saito Naoko, Ikeda Shunsuke, Ishihara Shoichiro
Department of Diagnostic Radiology, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama, 350-1298, Japan.
Department of Intravascular Neurosurgery, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Japan.
Surg Radiol Anat. 2015 Oct;37(8):1009-12. doi: 10.1007/s00276-015-1441-8. Epub 2015 Feb 3.
Extremely rarely, the ophthalmic artery (OphA) arises from the A1 segment of the anterior cerebral artery (ACA). Discovery of this anomalous OphA during angiography or surgery has been reported in several patients. We report a case in which an OphA of ACA origin was diagnosed by magnetic resonance (MR) angiography and confirmed by selective cerebral angiography. To our knowledge, this is the first report of this variation with MR angiography. Careful observation of MR angiographic images is important for detecting rare arterial variations. Partial maximum-intensity-projection images are useful in identifying tiny anomalous arteries on MR angiography.
极罕见情况下，眼动脉（OphA）起源于大脑前动脉（ACA）的A1段。数例患者的血管造影或手术中已报告发现这种异常的眼动脉。我们报告1例通过磁共振（MR）血管造影诊断为起源于ACA的眼动脉，并经选择性脑血管造影证实。据我们所知，这是首例通过MR血管造影发现这种变异的报告。仔细观察MR血管造影图像对于检测罕见的动脉变异很重要。部分最大强度投影图像有助于在MR血管造影上识别微小的异常动脉。
