Mandato Ylenia, Pecoraro Cesira, Gagliardi Giuliano, Tecame Mario
U.O.C. di Diagnostica per Immagini, Ospedale Evangelico Fondazione Betania di Napoli, Napoli, Italy.
Dipartimento Medico-Chirurgico di Internistica Clinica e Sperimentale "F. Magrassi - A. Lanzara," Università degli Studi della Campania "Luigi Vanvitelli," Napoli, Italy.
Radiol Case Rep. 2019 Jun 29;14(9):1063-1068. doi: 10.1016/j.radcr.2019.06.003. eCollection 2019 Sep.
Interruption of the inferior vena cava (IVC) with azygos continuation is a rare congenital anomaly, in which the IVC is interrupted below the hepatic vein and venous return beyond this point is restored by the dilated azygos and hemiazygos veins draining into the superior vena cava. A case of the interruption of the IVC with azygos/emyazygos continuation for the absence of the hepatic segment of IVC, left renal vein duplication, and polysplenia is reported. The embryologic, clinical, and radiological significance are discussed. The diagnosis is suggested by X-ray, but contrast-enhanced multidetector computed tomography is the method of choice to diagnose this venous anomaly and reveals the aberrant vascular structures. Awareness of different congenital anomalies of IVC is important to surgeons and cardiologists and is necessary for radiologists to avoid diagnostic pitfalls and for preoperative planning: they should be remembered because they can influence several surgical interventions and endovascular procedures. Accidental ligation of the azygos vein is fatal and cardiac catheterization using the lower extremity vein is troublesome in patients with this condition.
下腔静脉中断伴奇静脉延续是一种罕见的先天性异常，即下腔静脉在肝静脉下方中断，该点以下的静脉回流通过扩张的奇静脉和半奇静脉引流至上腔静脉得以恢复。本文报道了一例因下腔静脉肝段缺如、左肾静脉重复及多脾而导致的下腔静脉中断伴奇静脉/半奇静脉延续的病例。文中讨论了其胚胎学、临床及放射学意义。X线可提示诊断，但对比增强多层螺旋CT是诊断这种静脉异常的首选方法，可显示异常的血管结构。了解下腔静脉的不同先天性异常对外科医生和心脏病专家很重要，对放射科医生避免诊断陷阱和进行术前规划也很必要：应牢记这些异常，因为它们会影响多种外科手术和血管内操作。意外结扎奇静脉会导致致命后果，在患有这种疾病的患者中，利用下肢静脉进行心脏导管插入术会很麻烦。
