Hayashi Toshihiko, Ichikawa Tamaki, Yamamuro Hiroshi, Ono Shun, Kobayashi Makiko, Nomura Takakiyo, Hashida Kazunobu, Yashiro Hideki, Okochi Tomohisa, Koizumi Jun, Shimura Shinichiro, Hasebe Terumitsu, Imai Yutaka
Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, kanagawa 259-1193, Japan.
Tokai J Exp Clin Med. 2018 Apr 20;43(1):30-37.
We evaluated radiological findings and clinical significance of right aortic arch with mirror-image branching (RAMI) in adults using data from computed tomography (CT) examinations.
We reviewed recorded reports and CT images obtained from university and branch hospitals for RAMI in adults. The RAMI incidence in adults found on CT was assessed. Associated congenital and acquired cardiovascular diseases were evaluated.
A total of 27 cases (14 men, 13 women; mean age, 59.4 ± 18.3 years) of RAMI were found. Among 107,014 cases in three hospitals, the RAMI incidence in the first, second, and third Tokai University hospitals were 0.018%, 0.012%, and 0.012%, respectively. Eight cases had high aortic arches and four cases had aortic diverticulum (AD) in proximal descending aorta. Three cases had a history of tetralogy of Fallot. One case with an absent left pulmonary artery and three cases with an aberrant left brachiocephalic vein were found incidentally. Two cases were associated with AD aneurysm and vascular ring formation. One case had stenosis of the left subclavian artery due to injury.
Cases of RAMI found in CT examinations in adults were extremely rare. Some cases were associated with congenital anomalies and/or acquired cardiovascular disease.
我们利用计算机断层扫描（CT）检查数据评估了成人镜像分支右主动脉弓（RAMI）的影像学表现及临床意义。
我们回顾了大学及附属医院有关成人RAMI的记录报告和CT图像。评估了CT检查中发现的成人RAMI发病率。对相关的先天性和后天性心血管疾病进行了评估。
共发现27例RAMI病例（14例男性，13例女性；平均年龄59.4±18.3岁）。在三家医院的107014例病例中，东海大学第一、第二和第三医院的RAMI发病率分别为0.018%、0.012%和0.012%。8例有高位主动脉弓，4例在降主动脉近端有主动脉憩室（AD）。3例有法洛四联症病史。偶然发现1例左肺动脉缺如，3例左头臂静脉异常。2例与AD动脉瘤和血管环形成有关。1例因损伤导致左锁骨下动脉狭窄。
在成人CT检查中发现的RAMI病例极为罕见。部分病例与先天性异常和/或后天性心血管疾病有关。
